TY  - JOUR
AU  - Bačkalov, Igor
AU  - Vidić, Milica
AU  - Rudaković, Stefan
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6918
AB  - The collection of data on accidents in inland navigation is not mandatory in many European countries. The lack of a harmonized methodology or a centralized database of information on accidents makes it difficult to have a comprehensive picture of safety on European inland waterways. The problem becomes particularly evident in light of significant navigational challenges such as the introduction of autonomous shipping. To provide a better understanding of safety in inland navigation, the paper presents the results of an analysis of data on some 700 accidents which took place on the inland waterways in Austria and Serbia, over a 15-year period (2001/2002–2017). The analysis identifies the safety “hot spots” and the most important safety issues on examined waterways. Contrary to the widely-accepted belief, the results do not confirm that most of the accidents could be attributed to human failures and show that the removal of human operators from inland vessels could only have a limited positive impact on safety unless other aspects (primarily related to maintenance of the fleet and the waterway) are considered. Consequently, the paper outlines the fundamental conditions in which it would be possible to reduce the human presence or even remove the crew from inland ships.
PB  - Elsevier
T2  - Ocean Engineering
T1  - Lessons learned from accidents on some major European inland waterways
IS  - 113918
VL  - 273
DO  - 10.1016/j.oceaneng.2023.113918
ER  - 

@article{
author = "Bačkalov, Igor and Vidić, Milica and Rudaković, Stefan",
year = "2023",
abstract = "The collection of data on accidents in inland navigation is not mandatory in many European countries. The lack of a harmonized methodology or a centralized database of information on accidents makes it difficult to have a comprehensive picture of safety on European inland waterways. The problem becomes particularly evident in light of significant navigational challenges such as the introduction of autonomous shipping. To provide a better understanding of safety in inland navigation, the paper presents the results of an analysis of data on some 700 accidents which took place on the inland waterways in Austria and Serbia, over a 15-year period (2001/2002–2017). The analysis identifies the safety “hot spots” and the most important safety issues on examined waterways. Contrary to the widely-accepted belief, the results do not confirm that most of the accidents could be attributed to human failures and show that the removal of human operators from inland vessels could only have a limited positive impact on safety unless other aspects (primarily related to maintenance of the fleet and the waterway) are considered. Consequently, the paper outlines the fundamental conditions in which it would be possible to reduce the human presence or even remove the crew from inland ships.",
publisher = "Elsevier",
journal = "Ocean Engineering",
title = "Lessons learned from accidents on some major European inland waterways",
number = "113918",
volume = "273",
doi = "10.1016/j.oceaneng.2023.113918"
}

Bačkalov, I., Vidić, M.,& Rudaković, S.. (2023). Lessons learned from accidents on some major European inland waterways. in Ocean Engineering
Elsevier., 273(113918).
https://doi.org/10.1016/j.oceaneng.2023.113918

Bačkalov I, Vidić M, Rudaković S. Lessons learned from accidents on some major European inland waterways. in Ocean Engineering. 2023;273(113918).
doi:10.1016/j.oceaneng.2023.113918 .

Bačkalov, Igor, Vidić, Milica, Rudaković, Stefan, "Lessons learned from accidents on some major European inland waterways" in Ocean Engineering, 273, no. 113918 (2023),
https://doi.org/10.1016/j.oceaneng.2023.113918 . .

TY  - JOUR
AU  - Motok, Milorad
AU  - Momčilović, Nikola
AU  - Rudaković, Stefan
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3690
AB  - More than twenty years ago it was acknowledged that methods used in ship design, which affect safety of the vessel, are less sophisticated and modern compared to those used in some other industries, for instance aeronautics or nuclear. The most apparent response to this setback was enforced development of reliability based methods for ship structural design. Implementation of those in the state-of-the-art rules and codes for design of ocean-going vessels is recognizable. However, much less, if anything, was done in this matter for river-sea ships, although a significant portion of their demands and capacity is stochastic in its nature. This paper is aimed to be a pilot research in this field. It uses probability approach to estimate the reliability index of Rule based formulas for still water bending moment, i.e., the probability that thus obtained values will not be overcome by actual, lege artis calculated values. It is based on analyses of more than 400 load cases of 37 prominent river-sea tankers. Acquired results are also input parameters for further analyses, which would include wave induced loads and are the subject of succeeding investigations.
PB  - Elsevier Sci Ltd, Oxford
T2  - Marine Structures
T1  - Reliability based structural design of river-sea tankers: Still water loading effects
VL  - 83
DO  - 10.1016/j.marstruc.2022.103202
ER  - 

@article{
author = "Motok, Milorad and Momčilović, Nikola and Rudaković, Stefan",
year = "2022",
abstract = "More than twenty years ago it was acknowledged that methods used in ship design, which affect safety of the vessel, are less sophisticated and modern compared to those used in some other industries, for instance aeronautics or nuclear. The most apparent response to this setback was enforced development of reliability based methods for ship structural design. Implementation of those in the state-of-the-art rules and codes for design of ocean-going vessels is recognizable. However, much less, if anything, was done in this matter for river-sea ships, although a significant portion of their demands and capacity is stochastic in its nature. This paper is aimed to be a pilot research in this field. It uses probability approach to estimate the reliability index of Rule based formulas for still water bending moment, i.e., the probability that thus obtained values will not be overcome by actual, lege artis calculated values. It is based on analyses of more than 400 load cases of 37 prominent river-sea tankers. Acquired results are also input parameters for further analyses, which would include wave induced loads and are the subject of succeeding investigations.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Marine Structures",
title = "Reliability based structural design of river-sea tankers: Still water loading effects",
volume = "83",
doi = "10.1016/j.marstruc.2022.103202"
}

Motok, M., Momčilović, N.,& Rudaković, S.. (2022). Reliability based structural design of river-sea tankers: Still water loading effects. in Marine Structures
Elsevier Sci Ltd, Oxford., 83.
https://doi.org/10.1016/j.marstruc.2022.103202

Motok M, Momčilović N, Rudaković S. Reliability based structural design of river-sea tankers: Still water loading effects. in Marine Structures. 2022;83.
doi:10.1016/j.marstruc.2022.103202 .

Motok, Milorad, Momčilović, Nikola, Rudaković, Stefan, "Reliability based structural design of river-sea tankers: Still water loading effects" in Marine Structures, 83 (2022),
https://doi.org/10.1016/j.marstruc.2022.103202 . .

TY  - CONF
AU  - Vasilev, Matija
AU  - Kalajdžić, Milan
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6733
AB  - The biofouling of ship hulls has a significant impact on both the environment and the ship. A negative effect on the environment is manifested by an increase in pollution with greenhouse gasses and disrupting the ecosystem by translocating microorganisms, sea plants or animals from one place to another. Biofouling film which appears on the immersed hull part through the years increases surface roughness and therefore induces a streamlines disturbance and together with increased wet surface affects the increase in total resistance. As a result of greater total resistance, a larger amount of fuel combusts over time, thus greenhouse emission is being increased. A numerical model based on Reynolds Averaged Navier-Stokes (RANS) equations with incorporated different roughness effects as equivalent sand grain roughness height in one Computational Fluid Dynamics (CFD) software has been conducted in this paper. Simulation has been applied to one bulk carrier and represents the effect of dry-docking the ship after several years in operation and treating the hull with high-performance coat such as self-polishing coating (SPC) or silicone- and fluorine-based fouling coatings (FRC).
PB  - Inno Gatin
PB  - Milovan Perić
C3  - Proceedings of 24th Numerical Towing Tank Symposium October 2022 (NuTTS 2022), Zagreb, Croatia
T1  - The Influence of Roughness Change on Ship Resistance in CFD Simulations
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6733
ER  - 

@conference{
author = "Vasilev, Matija and Kalajdžić, Milan",
year = "2022",
abstract = "The biofouling of ship hulls has a significant impact on both the environment and the ship. A negative effect on the environment is manifested by an increase in pollution with greenhouse gasses and disrupting the ecosystem by translocating microorganisms, sea plants or animals from one place to another. Biofouling film which appears on the immersed hull part through the years increases surface roughness and therefore induces a streamlines disturbance and together with increased wet surface affects the increase in total resistance. As a result of greater total resistance, a larger amount of fuel combusts over time, thus greenhouse emission is being increased. A numerical model based on Reynolds Averaged Navier-Stokes (RANS) equations with incorporated different roughness effects as equivalent sand grain roughness height in one Computational Fluid Dynamics (CFD) software has been conducted in this paper. Simulation has been applied to one bulk carrier and represents the effect of dry-docking the ship after several years in operation and treating the hull with high-performance coat such as self-polishing coating (SPC) or silicone- and fluorine-based fouling coatings (FRC).",
publisher = "Inno Gatin, Milovan Perić",
journal = "Proceedings of 24th Numerical Towing Tank Symposium October 2022 (NuTTS 2022), Zagreb, Croatia",
title = "The Influence of Roughness Change on Ship Resistance in CFD Simulations",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6733"
}

Vasilev, M.,& Kalajdžić, M.. (2022). The Influence of Roughness Change on Ship Resistance in CFD Simulations. in Proceedings of 24th Numerical Towing Tank Symposium October 2022 (NuTTS 2022), Zagreb, Croatia
Inno Gatin..
https://hdl.handle.net/21.15107/rcub_machinery_6733

Vasilev M, Kalajdžić M. The Influence of Roughness Change on Ship Resistance in CFD Simulations. in Proceedings of 24th Numerical Towing Tank Symposium October 2022 (NuTTS 2022), Zagreb, Croatia. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_6733 .

Vasilev, Matija, Kalajdžić, Milan, "The Influence of Roughness Change on Ship Resistance in CFD Simulations" in Proceedings of 24th Numerical Towing Tank Symposium October 2022 (NuTTS 2022), Zagreb, Croatia (2022),
https://hdl.handle.net/21.15107/rcub_machinery_6733 .

TY  - CONF
AU  - Kalajdžić, Milan
AU  - Vasilev, Matija
AU  - Momčilović, Nikola
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6725
AB  - Inland waterway industry is far smaller than maritime and therefore, provides less environmental impact. However, its local effect is not negligible. Even though maritime practice has been addressing energy efficiency of ships for decade, no corresponding measures were delivered in inland waterway industry, considering the Green Deal goals. However, there are few proposals for addressing the energy efficiency of inland vessels. Hence, this work tries to gather such proposals and provide a review on their current status.
PB  - Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb
C3  - SORTA 2022 PROCEEDINGS - 25th SYMPOSIUM ON THE THEORY AND PRACTICE OF SHIPBUILDING
T1  - Energy Efficiency of Inland Vessels: Current Status
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6725
ER  - 

@conference{
author = "Kalajdžić, Milan and Vasilev, Matija and Momčilović, Nikola",
year = "2022",
abstract = "Inland waterway industry is far smaller than maritime and therefore, provides less environmental impact. However, its local effect is not negligible. Even though maritime practice has been addressing energy efficiency of ships for decade, no corresponding measures were delivered in inland waterway industry, considering the Green Deal goals. However, there are few proposals for addressing the energy efficiency of inland vessels. Hence, this work tries to gather such proposals and provide a review on their current status.",
publisher = "Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb",
journal = "SORTA 2022 PROCEEDINGS - 25th SYMPOSIUM ON THE THEORY AND PRACTICE OF SHIPBUILDING",
title = "Energy Efficiency of Inland Vessels: Current Status",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6725"
}

Kalajdžić, M., Vasilev, M.,& Momčilović, N.. (2022). Energy Efficiency of Inland Vessels: Current Status. in SORTA 2022 PROCEEDINGS - 25th SYMPOSIUM ON THE THEORY AND PRACTICE OF SHIPBUILDING
Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb..
https://hdl.handle.net/21.15107/rcub_machinery_6725

Kalajdžić M, Vasilev M, Momčilović N. Energy Efficiency of Inland Vessels: Current Status. in SORTA 2022 PROCEEDINGS - 25th SYMPOSIUM ON THE THEORY AND PRACTICE OF SHIPBUILDING. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_6725 .

Kalajdžić, Milan, Vasilev, Matija, Momčilović, Nikola, "Energy Efficiency of Inland Vessels: Current Status" in SORTA 2022 PROCEEDINGS - 25th SYMPOSIUM ON THE THEORY AND PRACTICE OF SHIPBUILDING (2022),
https://hdl.handle.net/21.15107/rcub_machinery_6725 .

TY  - THES
AU  - Rudaković, Stefan
PY  - 2021
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=8205
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:23898/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=39398665
UR  - https://nardus.mpn.gov.rs/handle/123456789/18384
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/80
AB  - Ci	 teze je osmisliti novi postupak za procenu stabiliteta reqno-morskih bro- dova u neoxteenom stau, uzimajui u obzir realne vremenske uslove i naprednu hidrodinamiku. Reqno-morski brodovi su pre svega reqni brodovi koji mogu da plove u obalnim podruqjima, pod uslovom da su ispueni odreeni tehniqki i vremenski uslovi. Iako plove u priobalnim podruqjima, u suxtini nisu pro- jektovani u skladu sa meunarodnim propisima predvienim za morske brodove. Stoga su razliqita nacionalna regulatorna tela osmislila skup propisa kojim regulixu ovaj tip plovidbe. Meutim, ovi propisi se baziraju na determinis- tiqkim polu-empirijskim metodama prilagoenim ordeenim brodovima i oblas- tima plovidbe. U disertaciji je zbog toga analizirana mogunost primene Druge generacije kriterijuma stabiliteta broda u neoxteenom stau, pre svega drugog nivoa ovog kriterijuma. To je najsavremeniji skup kriterijuma za morske brodove koji je predloila Meunarodna pomorska organizacija (International Maritime Organisation). Meutim, potrebno je izmeniti odreene metode i postupke sadrane u kriterijumima, kako bi se uspexno primenili na reqno-morske brodove. Zbog toga se sledee teme ispituju u disertaciji, kako bi se ustanovio ihov uticaj na sta- bilitet broda: prilagoavae vremenskih uslova, modifikacija metode za pro- cenu priguxea usled va	aa i primena napredne metode za procenu efektivnog nagiba talasa i sopstvene frekvencije va	aa broda. Takoe, u tezi se koristi kocept operacionih ograniqea reqno-morskih brodova u pogledu maksimalne znaqajne visine talasa, a uvodi se i pojam indeksa operacionih ograniqea. Za kraj, predloen je jednostavan postupak procene stabiliteta koji odgovara prvom nivou kriterijuma, a baziran je na regresionoj analizi.
AB  - The goal of the thesis is to conceive a novel procedure for intact stability assessment of riversea ships taking into account realistic environmental conditions and advanced hydrodynamics. River-sea ships are primarily inland navigation vessels that are allowed to operate in coastal areas, if technical requirements are met and environmental conditions are favourable. Although they take part in coastal operations, in general, they are not designed in compliance with international maritime regulations intended for sea-going ships. Instead, individual national regulatory bodies conceived their own sets of regulations. However, these regulations employ deterministic semi-empirical procedures based on design practice and particular operational experience in the designated area, and as such, are inevitably location-specic. Therefore, the possibility to apply the Second Generation Intact Stability Criteria (SGISC), particularly the Vulnerability Level 2 of the SGISC, to river-sea ships is analysed in the thesis. The SGISC is the state-of-the-art set of intact stability criteria for sea-going ships, laid down by International Maritime Organization. However, several methods and procedures within the SGISC need to be altered in order to successfully implement the framework on river-sea ships. Therefore, the thesis investigates the eects on stability assessment of: the modication of environmental conditions, the adjustment of roll damping estimation method, and the use of advanced methods for eective wave slope coecient and natural roll period calculations. Furthermore, the thesis makes use of the concept of operational limitations of river-sea ships with respect to the maximum signicant wave height, and proposes a set of indices for evaluation of operability of vessels from the point of view of stability in seaway. Finally, the thesis proposes a simple stability assessment procedure suitable for use at the Vulnerability Level 1 of the Dead Ship Condition, based on regression analysis.
PB  - Univerzitet u Beogradu, Mašinski fakultet
T1  - Inovativni pristup proceni stabiliteta rečno-morskih brodova
T1  - A novel approach to stability assessment of river-sea ships
UR  - https://hdl.handle.net/21.15107/rcub_nardus_18384
ER  - 

@phdthesis{
author = "Rudaković, Stefan",
year = "2021",
abstract = "Ci	 teze je osmisliti novi postupak za procenu stabiliteta reqno-morskih bro- dova u neoxteenom stau, uzimajui u obzir realne vremenske uslove i naprednu hidrodinamiku. Reqno-morski brodovi su pre svega reqni brodovi koji mogu da plove u obalnim podruqjima, pod uslovom da su ispueni odreeni tehniqki i vremenski uslovi. Iako plove u priobalnim podruqjima, u suxtini nisu pro- jektovani u skladu sa meunarodnim propisima predvienim za morske brodove. Stoga su razliqita nacionalna regulatorna tela osmislila skup propisa kojim regulixu ovaj tip plovidbe. Meutim, ovi propisi se baziraju na determinis- tiqkim polu-empirijskim metodama prilagoenim ordeenim brodovima i oblas- tima plovidbe. U disertaciji je zbog toga analizirana mogunost primene Druge generacije kriterijuma stabiliteta broda u neoxteenom stau, pre svega drugog nivoa ovog kriterijuma. To je najsavremeniji skup kriterijuma za morske brodove koji je predloila Meunarodna pomorska organizacija (International Maritime Organisation). Meutim, potrebno je izmeniti odreene metode i postupke sadrane u kriterijumima, kako bi se uspexno primenili na reqno-morske brodove. Zbog toga se sledee teme ispituju u disertaciji, kako bi se ustanovio ihov uticaj na sta- bilitet broda: prilagoavae vremenskih uslova, modifikacija metode za pro- cenu priguxea usled va	aa i primena napredne metode za procenu efektivnog nagiba talasa i sopstvene frekvencije va	aa broda. Takoe, u tezi se koristi kocept operacionih ograniqea reqno-morskih brodova u pogledu maksimalne znaqajne visine talasa, a uvodi se i pojam indeksa operacionih ograniqea. Za kraj, predloen je jednostavan postupak procene stabiliteta koji odgovara prvom nivou kriterijuma, a baziran je na regresionoj analizi., The goal of the thesis is to conceive a novel procedure for intact stability assessment of riversea ships taking into account realistic environmental conditions and advanced hydrodynamics. River-sea ships are primarily inland navigation vessels that are allowed to operate in coastal areas, if technical requirements are met and environmental conditions are favourable. Although they take part in coastal operations, in general, they are not designed in compliance with international maritime regulations intended for sea-going ships. Instead, individual national regulatory bodies conceived their own sets of regulations. However, these regulations employ deterministic semi-empirical procedures based on design practice and particular operational experience in the designated area, and as such, are inevitably location-specic. Therefore, the possibility to apply the Second Generation Intact Stability Criteria (SGISC), particularly the Vulnerability Level 2 of the SGISC, to river-sea ships is analysed in the thesis. The SGISC is the state-of-the-art set of intact stability criteria for sea-going ships, laid down by International Maritime Organization. However, several methods and procedures within the SGISC need to be altered in order to successfully implement the framework on river-sea ships. Therefore, the thesis investigates the eects on stability assessment of: the modication of environmental conditions, the adjustment of roll damping estimation method, and the use of advanced methods for eective wave slope coecient and natural roll period calculations. Furthermore, the thesis makes use of the concept of operational limitations of river-sea ships with respect to the maximum signicant wave height, and proposes a set of indices for evaluation of operability of vessels from the point of view of stability in seaway. Finally, the thesis proposes a simple stability assessment procedure suitable for use at the Vulnerability Level 1 of the Dead Ship Condition, based on regression analysis.",
publisher = "Univerzitet u Beogradu, Mašinski fakultet",
title = "Inovativni pristup proceni stabiliteta rečno-morskih brodova, A novel approach to stability assessment of river-sea ships",
url = "https://hdl.handle.net/21.15107/rcub_nardus_18384"
}

Rudaković, S.. (2021). Inovativni pristup proceni stabiliteta rečno-morskih brodova. 
Univerzitet u Beogradu, Mašinski fakultet..
https://hdl.handle.net/21.15107/rcub_nardus_18384

Rudaković S. Inovativni pristup proceni stabiliteta rečno-morskih brodova. 2021;.
https://hdl.handle.net/21.15107/rcub_nardus_18384 .

Rudaković, Stefan, "Inovativni pristup proceni stabiliteta rečno-morskih brodova" (2021),
https://hdl.handle.net/21.15107/rcub_nardus_18384 .

TY  - JOUR
AU  - Kalajdžić, Milan
AU  - Momčilović, Nikola
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3398
AB  - The preliminary design stage is a starting and vital step in the ship design process which generally involves the adaptation of a prototype selected from an available and trustworthy vessel database. This investigation was prompted by the noticeable lack of systematic literature data on multi-purpose cargo vessels (MPCV), especially in the range of medium size fleet, with respect to gross tonnage. A procedure is presented for optimum MPCV characteristics determination in the preliminary design stage. It is grounded on a statistical analysis of the database gathered upon reliable MPCV built over the past 30 years. Using the proposed set of diagrams and formulas, the designers could determine ship principal dimensions upon required deadweight as a main prerequisite, as well as optimum energy efficiency design index, tank capacities, lightweight, etc.
PB  - Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb
T2  - Brodogradnja
T1  - A step toward the preliminary design of seagoing multi-purpose cargo vessels
EP  - 89
IS  - 2
SP  - 75
VL  - 71
DO  - 10.21278/brod71205
ER  - 

@article{
author = "Kalajdžić, Milan and Momčilović, Nikola",
year = "2020",
abstract = "The preliminary design stage is a starting and vital step in the ship design process which generally involves the adaptation of a prototype selected from an available and trustworthy vessel database. This investigation was prompted by the noticeable lack of systematic literature data on multi-purpose cargo vessels (MPCV), especially in the range of medium size fleet, with respect to gross tonnage. A procedure is presented for optimum MPCV characteristics determination in the preliminary design stage. It is grounded on a statistical analysis of the database gathered upon reliable MPCV built over the past 30 years. Using the proposed set of diagrams and formulas, the designers could determine ship principal dimensions upon required deadweight as a main prerequisite, as well as optimum energy efficiency design index, tank capacities, lightweight, etc.",
publisher = "Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb",
journal = "Brodogradnja",
title = "A step toward the preliminary design of seagoing multi-purpose cargo vessels",
pages = "89-75",
number = "2",
volume = "71",
doi = "10.21278/brod71205"
}

Kalajdžić, M.,& Momčilović, N.. (2020). A step toward the preliminary design of seagoing multi-purpose cargo vessels. in Brodogradnja
Univ Zagreb Fac Mechanical Engineering & Naval Architecture, Zagreb., 71(2), 75-89.
https://doi.org/10.21278/brod71205

Kalajdžić M, Momčilović N. A step toward the preliminary design of seagoing multi-purpose cargo vessels. in Brodogradnja. 2020;71(2):75-89.
doi:10.21278/brod71205 .

Kalajdžić, Milan, Momčilović, Nikola, "A step toward the preliminary design of seagoing multi-purpose cargo vessels" in Brodogradnja, 71, no. 2 (2020):75-89,
https://doi.org/10.21278/brod71205 . .

TY  - JOUR
AU  - Momčilović, Nikola
AU  - Motok, Milorad
AU  - Maneski, Taško
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3296
AB  - The paper presents a procedure for modeling an orthotropic thin plate finite element so to have an equivalent structural response as the steel stiffened plate of same overall dimensions. New, equivalent element, homogenizes the structural properties of plates and stiffeners in element's stiffness matrix. By use of such elements, a significant reduction in overall size of a global finite element model of large stiffened panel structures could be achieved. The algorithm of proposed procedure is fully explained and, as an example, applied to a standard global model of steel ship hull structure. Structural response comparison is made between reduced model made of newly defined thin finite elements and conventional ones. Advantages are emphasized and remedies of some recognized shortcomings are suggested.
PB  - Korean Soc Steel Construction-Kssc, Seoul
T2  - International Journal of Steel Structures
T1  - Derivation of Elastic Constants for Orthotropic Plates
EP  - 342
IS  - 1
SP  - 330
VL  - 20
DO  - 10.1007/s13296-019-00284-6
ER  - 

@article{
author = "Momčilović, Nikola and Motok, Milorad and Maneski, Taško",
year = "2020",
abstract = "The paper presents a procedure for modeling an orthotropic thin plate finite element so to have an equivalent structural response as the steel stiffened plate of same overall dimensions. New, equivalent element, homogenizes the structural properties of plates and stiffeners in element's stiffness matrix. By use of such elements, a significant reduction in overall size of a global finite element model of large stiffened panel structures could be achieved. The algorithm of proposed procedure is fully explained and, as an example, applied to a standard global model of steel ship hull structure. Structural response comparison is made between reduced model made of newly defined thin finite elements and conventional ones. Advantages are emphasized and remedies of some recognized shortcomings are suggested.",
publisher = "Korean Soc Steel Construction-Kssc, Seoul",
journal = "International Journal of Steel Structures",
title = "Derivation of Elastic Constants for Orthotropic Plates",
pages = "342-330",
number = "1",
volume = "20",
doi = "10.1007/s13296-019-00284-6"
}

Momčilović, N., Motok, M.,& Maneski, T.. (2020). Derivation of Elastic Constants for Orthotropic Plates. in International Journal of Steel Structures
Korean Soc Steel Construction-Kssc, Seoul., 20(1), 330-342.
https://doi.org/10.1007/s13296-019-00284-6

Momčilović N, Motok M, Maneski T. Derivation of Elastic Constants for Orthotropic Plates. in International Journal of Steel Structures. 2020;20(1):330-342.
doi:10.1007/s13296-019-00284-6 .

Momčilović, Nikola, Motok, Milorad, Maneski, Taško, "Derivation of Elastic Constants for Orthotropic Plates" in International Journal of Steel Structures, 20, no. 1 (2020):330-342,
https://doi.org/10.1007/s13296-019-00284-6 . .

TY  - JOUR
AU  - Bačkalov, Igor
PY  - 2020
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3415
AB  - The paper presents an analysis of technical regulations addressing the safety of inland cargo vessels in Europe, in light of the developments leading towards the introduction of autonomous ships in inland navigation. The regulations are scrutinized with respect to the role of human operators in attaining the appropriate level of safety on inland vessels, as well as in view of possibilities for the remote control and remote execution of safety functions on the vessels. The paper specifies some of the technical requirements, contained in the regulations, which ought to be amended in order to improve the conditions for introduction of autonomous inland vessels. Furthermore, the paper highlights the main differences between the existing rules governing the safety of seagoing ships and inland vessels and investigates the possibilities for improvement of the safety standards for European inland cargo ships based on international maritime regulations. Finally, a set of recommendations for the removal of regulatory barriers to autonomous inland navigation is put forward.
PB  - Elsevier, Amsterdam
T2  - Safety Science
T1  - Safety of autonomous inland vessels: An analysis of regulatory barriers in the present technical standards in Europe
VL  - 128
DO  - 10.1016/j.ssci.2020.104763
ER  - 

@article{
author = "Bačkalov, Igor",
year = "2020",
abstract = "The paper presents an analysis of technical regulations addressing the safety of inland cargo vessels in Europe, in light of the developments leading towards the introduction of autonomous ships in inland navigation. The regulations are scrutinized with respect to the role of human operators in attaining the appropriate level of safety on inland vessels, as well as in view of possibilities for the remote control and remote execution of safety functions on the vessels. The paper specifies some of the technical requirements, contained in the regulations, which ought to be amended in order to improve the conditions for introduction of autonomous inland vessels. Furthermore, the paper highlights the main differences between the existing rules governing the safety of seagoing ships and inland vessels and investigates the possibilities for improvement of the safety standards for European inland cargo ships based on international maritime regulations. Finally, a set of recommendations for the removal of regulatory barriers to autonomous inland navigation is put forward.",
publisher = "Elsevier, Amsterdam",
journal = "Safety Science",
title = "Safety of autonomous inland vessels: An analysis of regulatory barriers in the present technical standards in Europe",
volume = "128",
doi = "10.1016/j.ssci.2020.104763"
}

Bačkalov, I.. (2020). Safety of autonomous inland vessels: An analysis of regulatory barriers in the present technical standards in Europe. in Safety Science
Elsevier, Amsterdam., 128.
https://doi.org/10.1016/j.ssci.2020.104763

Bačkalov I. Safety of autonomous inland vessels: An analysis of regulatory barriers in the present technical standards in Europe. in Safety Science. 2020;128.
doi:10.1016/j.ssci.2020.104763 .

Bačkalov, Igor, "Safety of autonomous inland vessels: An analysis of regulatory barriers in the present technical standards in Europe" in Safety Science, 128 (2020),
https://doi.org/10.1016/j.ssci.2020.104763 . .

TY  - CONF
AU  - Kalajdžić, Milan
AU  - Momčilović, Nikola
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6720
AB  - Multi-purpose cargo vessels are intended to carry very dissimilar cargoes (bulk, containers, steel, wood etc.). The paper analyses main parameters to be used in preliminary design of such vessels of range between 88 to 207 m in length. Diagrams and trend lines are presented in order to help designers to choose particulars to design optimum ship characteristics. These parameters include speed, length, breadth, height, draught, displacement, block coefficient, required engine power, gross tonnage and number of containers. Analysis is performed based on comprehensive database of multi-purpose cargo vessels built over the past 30 years. Preliminary design procedure, in general, is explained since this stage (the choice of main dimensions) is most important in determining ship performance.
PB  - Faculty of Maritime Studies in Kotor, University of Montenegro
PB  - Faculty of Maritime Studies Split, University of Split
C3  - Book of Proceedings - 8th International Maritime Science Conference (IMSC2019), Budva, Montenegro, 2019
T1  - Preliminary Design Parameters of Multi-Purpose Cargo Vessels
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6720
ER  - 

@conference{
author = "Kalajdžić, Milan and Momčilović, Nikola",
year = "2019",
abstract = "Multi-purpose cargo vessels are intended to carry very dissimilar cargoes (bulk, containers, steel, wood etc.). The paper analyses main parameters to be used in preliminary design of such vessels of range between 88 to 207 m in length. Diagrams and trend lines are presented in order to help designers to choose particulars to design optimum ship characteristics. These parameters include speed, length, breadth, height, draught, displacement, block coefficient, required engine power, gross tonnage and number of containers. Analysis is performed based on comprehensive database of multi-purpose cargo vessels built over the past 30 years. Preliminary design procedure, in general, is explained since this stage (the choice of main dimensions) is most important in determining ship performance.",
publisher = "Faculty of Maritime Studies in Kotor, University of Montenegro, Faculty of Maritime Studies Split, University of Split",
journal = "Book of Proceedings - 8th International Maritime Science Conference (IMSC2019), Budva, Montenegro, 2019",
title = "Preliminary Design Parameters of Multi-Purpose Cargo Vessels",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6720"
}

Kalajdžić, M.,& Momčilović, N.. (2019). Preliminary Design Parameters of Multi-Purpose Cargo Vessels. in Book of Proceedings - 8th International Maritime Science Conference (IMSC2019), Budva, Montenegro, 2019
Faculty of Maritime Studies in Kotor, University of Montenegro..
https://hdl.handle.net/21.15107/rcub_machinery_6720

Kalajdžić M, Momčilović N. Preliminary Design Parameters of Multi-Purpose Cargo Vessels. in Book of Proceedings - 8th International Maritime Science Conference (IMSC2019), Budva, Montenegro, 2019. 2019;.
https://hdl.handle.net/21.15107/rcub_machinery_6720 .

Kalajdžić, Milan, Momčilović, Nikola, "Preliminary Design Parameters of Multi-Purpose Cargo Vessels" in Book of Proceedings - 8th International Maritime Science Conference (IMSC2019), Budva, Montenegro, 2019 (2019),
https://hdl.handle.net/21.15107/rcub_machinery_6720 .

TY  - JOUR
AU  - Rudaković, Stefan
AU  - Bačkalov, Igor
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3127
AB  - The paper examines the possibilities for using the Second Generation Intact Stability Criteria (SGISC) framework in stability assessment and calculation of operational limitations of the river-sea ships. The level 2 vulnerability assessment procedures for dead ship condition (DSC) and excessive accelerations (EA) are used to derive the operational limitations of a typical European inland container vessel in the North Sea coastal zone. The results are in good agreement with the operational experience in the designated area, but provide additional insights into safety of river-sea ships that could not have been observed by the classic stability analysis. It is shown that the approach used by the SGISC could be successfully applied to river-sea ships, provided that appropriate modifications of the Criteria are introduced.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Ocean Engineering
T1  - Operational limitations of a river-sea container vessel in the framework of the Second Generation Intact Stability Criteria
EP  - 418
SP  - 409
VL  - 183
DO  - 10.1016/j.oceaneng.2019.05.013
ER  - 

@article{
author = "Rudaković, Stefan and Bačkalov, Igor",
year = "2019",
abstract = "The paper examines the possibilities for using the Second Generation Intact Stability Criteria (SGISC) framework in stability assessment and calculation of operational limitations of the river-sea ships. The level 2 vulnerability assessment procedures for dead ship condition (DSC) and excessive accelerations (EA) are used to derive the operational limitations of a typical European inland container vessel in the North Sea coastal zone. The results are in good agreement with the operational experience in the designated area, but provide additional insights into safety of river-sea ships that could not have been observed by the classic stability analysis. It is shown that the approach used by the SGISC could be successfully applied to river-sea ships, provided that appropriate modifications of the Criteria are introduced.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Ocean Engineering",
title = "Operational limitations of a river-sea container vessel in the framework of the Second Generation Intact Stability Criteria",
pages = "418-409",
volume = "183",
doi = "10.1016/j.oceaneng.2019.05.013"
}

Rudaković, S.,& Bačkalov, I.. (2019). Operational limitations of a river-sea container vessel in the framework of the Second Generation Intact Stability Criteria. in Ocean Engineering
Pergamon-Elsevier Science Ltd, Oxford., 183, 409-418.
https://doi.org/10.1016/j.oceaneng.2019.05.013

Rudaković S, Bačkalov I. Operational limitations of a river-sea container vessel in the framework of the Second Generation Intact Stability Criteria. in Ocean Engineering. 2019;183:409-418.
doi:10.1016/j.oceaneng.2019.05.013 .

Rudaković, Stefan, Bačkalov, Igor, "Operational limitations of a river-sea container vessel in the framework of the Second Generation Intact Stability Criteria" in Ocean Engineering, 183 (2019):409-418,
https://doi.org/10.1016/j.oceaneng.2019.05.013 . .

TY  - JOUR
AU  - Momčilović, Nikola
AU  - Motok, Milorad
AU  - Maneski, Taško
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3234
AB  - Koncentracija napona u uglu kvadratnog otvora u ploči je poznata činjenica. Najčešće se uzima da je najveća koncentracija napona u samom temenu ugla (na ugaonoj koordinati od 45 stepeni u slučaju kvadratnog otvora). Rigoroznije analize, ipak, prikazuju da ovo baš nije najtačnije. Iako maksimalni napon nikada "ne napušta" ugao, u nekim proračunima koncentracije napona, ozbiljnije analize ovog fenomena dobijaju na značaju. U ovom radu prikazani su i poređeni rezultati analitičke, numeričke i eksperimentalne analize tačne pozicije koncentracije napona u uglu otvora, u slučaju ploče pri istezanju.
AB  - Development of stress concentration in the corner zone of rectangular plate opening is a well-known fact. It is usually literally taken that the largest stress concentration factor (SCF) occurs exactly in the corner (at angle coordinate of 45 degrees in case of square opening). More rigorous analyses, however, reveal that this is not perfectly true. Although maximum stress never really "leaves the corner", for some hot-spot analyses, more scrupulous investigation of this phenomenon has significance. In this paper, results of some analytical, numerical and experimental investigations of this topic, for plate in tension, are presented and compared.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Tačka najvećeg napona na konturi kvadratnog otvora u ploči
T1  - Hot spot along corner curvature of rectangular plate opening
EP  - 850
IS  - 4
SP  - 846
VL  - 47
DO  - 10.5937/fmet1904846M
ER  - 

@article{
author = "Momčilović, Nikola and Motok, Milorad and Maneski, Taško",
year = "2019",
abstract = "Koncentracija napona u uglu kvadratnog otvora u ploči je poznata činjenica. Najčešće se uzima da je najveća koncentracija napona u samom temenu ugla (na ugaonoj koordinati od 45 stepeni u slučaju kvadratnog otvora). Rigoroznije analize, ipak, prikazuju da ovo baš nije najtačnije. Iako maksimalni napon nikada "ne napušta" ugao, u nekim proračunima koncentracije napona, ozbiljnije analize ovog fenomena dobijaju na značaju. U ovom radu prikazani su i poređeni rezultati analitičke, numeričke i eksperimentalne analize tačne pozicije koncentracije napona u uglu otvora, u slučaju ploče pri istezanju., Development of stress concentration in the corner zone of rectangular plate opening is a well-known fact. It is usually literally taken that the largest stress concentration factor (SCF) occurs exactly in the corner (at angle coordinate of 45 degrees in case of square opening). More rigorous analyses, however, reveal that this is not perfectly true. Although maximum stress never really "leaves the corner", for some hot-spot analyses, more scrupulous investigation of this phenomenon has significance. In this paper, results of some analytical, numerical and experimental investigations of this topic, for plate in tension, are presented and compared.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Tačka najvećeg napona na konturi kvadratnog otvora u ploči, Hot spot along corner curvature of rectangular plate opening",
pages = "850-846",
number = "4",
volume = "47",
doi = "10.5937/fmet1904846M"
}

Momčilović, N., Motok, M.,& Maneski, T.. (2019). Tačka najvećeg napona na konturi kvadratnog otvora u ploči. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 47(4), 846-850.
https://doi.org/10.5937/fmet1904846M

Momčilović N, Motok M, Maneski T. Tačka najvećeg napona na konturi kvadratnog otvora u ploči. in FME Transactions. 2019;47(4):846-850.
doi:10.5937/fmet1904846M .

Momčilović, Nikola, Motok, Milorad, Maneski, Taško, "Tačka najvećeg napona na konturi kvadratnog otvora u ploči" in FME Transactions, 47, no. 4 (2019):846-850,
https://doi.org/10.5937/fmet1904846M . .

TY  - JOUR
AU  - Rudaković, Stefan
AU  - Bulian, Gabriele
AU  - Bačkalov, Igor
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3114
AB  - The effective wave slope is a fundamental concept in simplified 1-DOF roll models, and predicted roll motion strongly depends on the assumed effective wave slope coefficient. This is relevant to regulatory frameworks based on 1-DOF roll models, such as IMO Weather Criterion or the under development Second Generation Intact Stability Criteria. The paper examines different methods for effective wave slope coefficient prediction, which could potentially be used for intact stability assessment of river-sea ships. In fact, there is a lack of studies specifically addressing this type of vessels. A database of existing inland and river-sea vessels is used for determining the effective wave slope coefficient by the considered methods, and results are compared and discussed. The used approaches comprise a direct calculation method based on linear seakeeping hydrodynamics, methods based on Froude-Krylov approximation, and semi-empirical methods. Obtained results suggest that the considered methods based on Froude-Krylov approximation provide similar predictions for river-sea ships, and tend to be conservative in the vast majority of cases. Results also suggest that the considered semi-empirical methods for effective wave slope coefficient prediction at natural roll frequency are unsuitable for river-sea ships, with a general tendency towards the overestimation.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Ocean Engineering
T1  - Effective wave slope coefficient of river-sea ships
VL  - 192
DO  - 10.1016/j.oceaneng.2019.106427
ER  - 

@article{
author = "Rudaković, Stefan and Bulian, Gabriele and Bačkalov, Igor",
year = "2019",
abstract = "The effective wave slope is a fundamental concept in simplified 1-DOF roll models, and predicted roll motion strongly depends on the assumed effective wave slope coefficient. This is relevant to regulatory frameworks based on 1-DOF roll models, such as IMO Weather Criterion or the under development Second Generation Intact Stability Criteria. The paper examines different methods for effective wave slope coefficient prediction, which could potentially be used for intact stability assessment of river-sea ships. In fact, there is a lack of studies specifically addressing this type of vessels. A database of existing inland and river-sea vessels is used for determining the effective wave slope coefficient by the considered methods, and results are compared and discussed. The used approaches comprise a direct calculation method based on linear seakeeping hydrodynamics, methods based on Froude-Krylov approximation, and semi-empirical methods. Obtained results suggest that the considered methods based on Froude-Krylov approximation provide similar predictions for river-sea ships, and tend to be conservative in the vast majority of cases. Results also suggest that the considered semi-empirical methods for effective wave slope coefficient prediction at natural roll frequency are unsuitable for river-sea ships, with a general tendency towards the overestimation.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Ocean Engineering",
title = "Effective wave slope coefficient of river-sea ships",
volume = "192",
doi = "10.1016/j.oceaneng.2019.106427"
}

Rudaković, S., Bulian, G.,& Bačkalov, I.. (2019). Effective wave slope coefficient of river-sea ships. in Ocean Engineering
Pergamon-Elsevier Science Ltd, Oxford., 192.
https://doi.org/10.1016/j.oceaneng.2019.106427

Rudaković S, Bulian G, Bačkalov I. Effective wave slope coefficient of river-sea ships. in Ocean Engineering. 2019;192.
doi:10.1016/j.oceaneng.2019.106427 .

Rudaković, Stefan, Bulian, Gabriele, Bačkalov, Igor, "Effective wave slope coefficient of river-sea ships" in Ocean Engineering, 192 (2019),
https://doi.org/10.1016/j.oceaneng.2019.106427 . .

TY  - CONF
AU  - Kalajdžić, Milan
AU  - Bobić, Darko
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6723
AB  - Given the global state of the energy markets, as well as the unpredictable future of the natural gas supply by the way of pipelines, it seems desirable to find another way of transport of this energent to end users in the inner part of Europe. The paper investigates whether inland waterway transport on the Danube could present a viable alternative in that respect and focuses on development of an LNG carrier that would be specifically designed for the Danube. Also, the paper will examine the implications of the extension of the service of the proposed design to the coastal areas of the Black Sea. As the shallow water sectors (at some places with depth well below 2.5 m) represent the main obstacle to development of navigation on the Danube, the proposed inland vessel should have a draught considerably shallower than existing, standard European inland cargo ships. This requires some additional considerations that go beyond present shipbuilding practice and conventional rules. In addition to shallow draught, the main design features of the inland vessel would be the
following. The inland vessel is to be designed with the dual-fuel propulsion, with boil-off gas being used as the main propulsion fuel. Special attention will be paid to energy-efficiency and the CO2 emissions, aiming at the inland vessel that would be as environmentally friendly as possible. The cargo tanks are foreseen to be independent from the inland vessel’s structure; by separating them from the hull, the inland vessel could be used for transport of bulk cargo or containers. Additionally, the paper will provide an overview of existing regulations referring to transport of the LNG by inland waterways but it will also address the applicability of the rules valid for the seagoing ships i.e. International Code of the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code) and International Code of Safety for Ships using Gases or other Low flashpoint Fuels (IGF Code).
PB  - University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture (FESB)
C3  - Book of Proceedings - 23th Symposium on Theory and Practice of Shipbuilding SORTA 2018, 27 - 29 Sep 2018, Split, Croatia
T1  - Unconventional inland LNG carrier design for the river Danube
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6723
ER  - 

@conference{
author = "Kalajdžić, Milan and Bobić, Darko",
year = "2018",
abstract = "Given the global state of the energy markets, as well as the unpredictable future of the natural gas supply by the way of pipelines, it seems desirable to find another way of transport of this energent to end users in the inner part of Europe. The paper investigates whether inland waterway transport on the Danube could present a viable alternative in that respect and focuses on development of an LNG carrier that would be specifically designed for the Danube. Also, the paper will examine the implications of the extension of the service of the proposed design to the coastal areas of the Black Sea. As the shallow water sectors (at some places with depth well below 2.5 m) represent the main obstacle to development of navigation on the Danube, the proposed inland vessel should have a draught considerably shallower than existing, standard European inland cargo ships. This requires some additional considerations that go beyond present shipbuilding practice and conventional rules. In addition to shallow draught, the main design features of the inland vessel would be the
following. The inland vessel is to be designed with the dual-fuel propulsion, with boil-off gas being used as the main propulsion fuel. Special attention will be paid to energy-efficiency and the CO2 emissions, aiming at the inland vessel that would be as environmentally friendly as possible. The cargo tanks are foreseen to be independent from the inland vessel’s structure; by separating them from the hull, the inland vessel could be used for transport of bulk cargo or containers. Additionally, the paper will provide an overview of existing regulations referring to transport of the LNG by inland waterways but it will also address the applicability of the rules valid for the seagoing ships i.e. International Code of the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code) and International Code of Safety for Ships using Gases or other Low flashpoint Fuels (IGF Code).",
publisher = "University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture (FESB)",
journal = "Book of Proceedings - 23th Symposium on Theory and Practice of Shipbuilding SORTA 2018, 27 - 29 Sep 2018, Split, Croatia",
title = "Unconventional inland LNG carrier design for the river Danube",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6723"
}

Kalajdžić, M.,& Bobić, D.. (2018). Unconventional inland LNG carrier design for the river Danube. in Book of Proceedings - 23th Symposium on Theory and Practice of Shipbuilding SORTA 2018, 27 - 29 Sep 2018, Split, Croatia
University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture (FESB)..
https://hdl.handle.net/21.15107/rcub_machinery_6723

Kalajdžić M, Bobić D. Unconventional inland LNG carrier design for the river Danube. in Book of Proceedings - 23th Symposium on Theory and Practice of Shipbuilding SORTA 2018, 27 - 29 Sep 2018, Split, Croatia. 2018;.
https://hdl.handle.net/21.15107/rcub_machinery_6723 .

Kalajdžić, Milan, Bobić, Darko, "Unconventional inland LNG carrier design for the river Danube" in Book of Proceedings - 23th Symposium on Theory and Practice of Shipbuilding SORTA 2018, 27 - 29 Sep 2018, Split, Croatia (2018),
https://hdl.handle.net/21.15107/rcub_machinery_6723 .

TY  - JOUR
AU  - Radojčić, Dejan 
AU  - Kalajdžić, Milan
AU  - Zgradić, Antonio B.
AU  - Simić, Aleksandar
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2584
AB  - Recent advances in high-speed computing, combined with the emergence of artificial neural network (ANN) techniques for the analysis of large data sets, has enabled researchers to provide the design community with higher-resolution mathematical models (MMs) for existing test data. Presently, one of the most popular planing hull prediction methods for resistance and trim are based on regressions of the Series 62 database. New MMs developed here address two major shortcomings of the original approaches; first, the equations are now continuous functions of volumetric Froude number (rather than separate regressions for each speed), and second, MM for trim is much more accurate, enabling designers to identify the double hump in trim that is associated with dynamic instabilities at higher speeds. This work describes the derivation of MMs for calm water resistance and running trim angle corresponding to volume Froude numbers of 1.0-4.0, and includes not only the original David Taylor Model Basin Series 62 data for 12.5 degrees deadrise, but also the later extensions made by Delft University of Technology, including 25 degrees and 30 degrees deadrise. Part 1 of this research, published separately, explains the streamlining of the foundational database-how outliers are identified, and methods to provide a database from which stable MM can be developed. The present article, Part 2, deals with the derivation of the actual mathematical model. Two ANN techniques were used, with single output, which has been applied to similar problems in the past, and with multiple output, which is a new approach to the problem. The results of the two different methods, both developing satisfactory models, are discussed and compared.
PB  - Soc Naval Architects Marine Engineers, Jersey City
T2  - Journal of Ship Production and Design
T1  - Resistance and Trim Modeling of a Systematic Planing Hull Series 62 (with 12.5 degrees, 25 degrees, and 30 degrees Deadrise Angles) Using Artificial Neural Networks, Part 2: Mathematical Models
EP  - 275
IS  - 4
SP  - 257
VL  - 33
DO  - 10.5957/JSPD.160016
ER  - 

@article{
author = "Radojčić, Dejan  and Kalajdžić, Milan and Zgradić, Antonio B. and Simić, Aleksandar",
year = "2017",
abstract = "Recent advances in high-speed computing, combined with the emergence of artificial neural network (ANN) techniques for the analysis of large data sets, has enabled researchers to provide the design community with higher-resolution mathematical models (MMs) for existing test data. Presently, one of the most popular planing hull prediction methods for resistance and trim are based on regressions of the Series 62 database. New MMs developed here address two major shortcomings of the original approaches; first, the equations are now continuous functions of volumetric Froude number (rather than separate regressions for each speed), and second, MM for trim is much more accurate, enabling designers to identify the double hump in trim that is associated with dynamic instabilities at higher speeds. This work describes the derivation of MMs for calm water resistance and running trim angle corresponding to volume Froude numbers of 1.0-4.0, and includes not only the original David Taylor Model Basin Series 62 data for 12.5 degrees deadrise, but also the later extensions made by Delft University of Technology, including 25 degrees and 30 degrees deadrise. Part 1 of this research, published separately, explains the streamlining of the foundational database-how outliers are identified, and methods to provide a database from which stable MM can be developed. The present article, Part 2, deals with the derivation of the actual mathematical model. Two ANN techniques were used, with single output, which has been applied to similar problems in the past, and with multiple output, which is a new approach to the problem. The results of the two different methods, both developing satisfactory models, are discussed and compared.",
publisher = "Soc Naval Architects Marine Engineers, Jersey City",
journal = "Journal of Ship Production and Design",
title = "Resistance and Trim Modeling of a Systematic Planing Hull Series 62 (with 12.5 degrees, 25 degrees, and 30 degrees Deadrise Angles) Using Artificial Neural Networks, Part 2: Mathematical Models",
pages = "275-257",
number = "4",
volume = "33",
doi = "10.5957/JSPD.160016"
}

Radojčić, D., Kalajdžić, M., Zgradić, A. B.,& Simić, A.. (2017). Resistance and Trim Modeling of a Systematic Planing Hull Series 62 (with 12.5 degrees, 25 degrees, and 30 degrees Deadrise Angles) Using Artificial Neural Networks, Part 2: Mathematical Models. in Journal of Ship Production and Design
Soc Naval Architects Marine Engineers, Jersey City., 33(4), 257-275.
https://doi.org/10.5957/JSPD.160016

Radojčić D, Kalajdžić M, Zgradić AB, Simić A. Resistance and Trim Modeling of a Systematic Planing Hull Series 62 (with 12.5 degrees, 25 degrees, and 30 degrees Deadrise Angles) Using Artificial Neural Networks, Part 2: Mathematical Models. in Journal of Ship Production and Design. 2017;33(4):257-275.
doi:10.5957/JSPD.160016 .

Radojčić, Dejan , Kalajdžić, Milan, Zgradić, Antonio B., Simić, Aleksandar, "Resistance and Trim Modeling of a Systematic Planing Hull Series 62 (with 12.5 degrees, 25 degrees, and 30 degrees Deadrise Angles) Using Artificial Neural Networks, Part 2: Mathematical Models" in Journal of Ship Production and Design, 33, no. 4 (2017):257-275,
https://doi.org/10.5957/JSPD.160016 . .

TY  - JOUR
AU  - Radojčić, Dejan 
AU  - Zgradić, Antonio B.
AU  - Kalajdžić, Milan
AU  - Simić, Aleksandar
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2557
AB  - Recent advances in high-speed computing, combined with the emergence of artificial neural network (ANN) techniques, for the analysis of large data sets have enabled researchers to provide the design community with higher-resolution mathematical models (MMs) for existing test data. Presently, one of the most popular planing hull prediction methods for resistance and trim are based on regressions of the Series 62 database. New MMs developed here address two major shortcomings of the original approaches; first, the equations are now continuous functions of volumetric Froude number (rather than separate regressions for each speed) and second, MM for trim is much more accurate, enabling designers to identify the double hump in trim that is associated with dynamic instabilities at higher speeds. This work includes not only the original David Taylor Model Basin (TMB) Series 62 data for 12.5 degrees deadrise, but also the later extensions made by Delft University of Technology (DUT), including 25 degrees and 30 degrees deadrise. The present report, Part 1, explains the procedures used to streamline a large foundational database to prepare for the derivation of an MM. This step is usually not discussed in detail, but the success of the entire procedure depends on it. In large data sets collected over multiple decades, there are often outliers in the data and pockets of the test matrix with insufficient test data for successful fitting of MMs. Because of the lack of data in these pockets, fitting routines for MMs have no incentive to produce rational results in these areas, often leading to an unstable model. In the past, overly stiff models were used to fair through these regions, at the expense of reduced accuracy in regions where there were sufficient data. This report describes the addition of "virtual measurements" based on interpolation or engineering calculations, which enable the model to produce reasonable results in regions of limited data, while also remaining accurate in regions with sufficient data. Additionally, an iterative procedure, where preliminary MMs are used to identify and eliminate outliers and erroneous points is described. The techniques described here can be applied to improve fitting of many types of data sets in Naval Architecture.
PB  - Soc Naval Architects Marine Engineers, Jersey City
T2  - Journal of Ship Production and Design
T1  - Resistance and Trim Modeling of a Systematic Planing Hull Series 62 (with 12.5 degrees, 25 degrees, and 30 degrees Deadrise Angles) Using Artificial Neural Networks, Part 1: The Database
EP  - 191
IS  - 3
SP  - 179
VL  - 33
DO  - 10.5957/JSPD.33.3.160015
ER  - 

@article{
author = "Radojčić, Dejan  and Zgradić, Antonio B. and Kalajdžić, Milan and Simić, Aleksandar",
year = "2017",
abstract = "Recent advances in high-speed computing, combined with the emergence of artificial neural network (ANN) techniques, for the analysis of large data sets have enabled researchers to provide the design community with higher-resolution mathematical models (MMs) for existing test data. Presently, one of the most popular planing hull prediction methods for resistance and trim are based on regressions of the Series 62 database. New MMs developed here address two major shortcomings of the original approaches; first, the equations are now continuous functions of volumetric Froude number (rather than separate regressions for each speed) and second, MM for trim is much more accurate, enabling designers to identify the double hump in trim that is associated with dynamic instabilities at higher speeds. This work includes not only the original David Taylor Model Basin (TMB) Series 62 data for 12.5 degrees deadrise, but also the later extensions made by Delft University of Technology (DUT), including 25 degrees and 30 degrees deadrise. The present report, Part 1, explains the procedures used to streamline a large foundational database to prepare for the derivation of an MM. This step is usually not discussed in detail, but the success of the entire procedure depends on it. In large data sets collected over multiple decades, there are often outliers in the data and pockets of the test matrix with insufficient test data for successful fitting of MMs. Because of the lack of data in these pockets, fitting routines for MMs have no incentive to produce rational results in these areas, often leading to an unstable model. In the past, overly stiff models were used to fair through these regions, at the expense of reduced accuracy in regions where there were sufficient data. This report describes the addition of "virtual measurements" based on interpolation or engineering calculations, which enable the model to produce reasonable results in regions of limited data, while also remaining accurate in regions with sufficient data. Additionally, an iterative procedure, where preliminary MMs are used to identify and eliminate outliers and erroneous points is described. The techniques described here can be applied to improve fitting of many types of data sets in Naval Architecture.",
publisher = "Soc Naval Architects Marine Engineers, Jersey City",
journal = "Journal of Ship Production and Design",
title = "Resistance and Trim Modeling of a Systematic Planing Hull Series 62 (with 12.5 degrees, 25 degrees, and 30 degrees Deadrise Angles) Using Artificial Neural Networks, Part 1: The Database",
pages = "191-179",
number = "3",
volume = "33",
doi = "10.5957/JSPD.33.3.160015"
}

Radojčić, D., Zgradić, A. B., Kalajdžić, M.,& Simić, A.. (2017). Resistance and Trim Modeling of a Systematic Planing Hull Series 62 (with 12.5 degrees, 25 degrees, and 30 degrees Deadrise Angles) Using Artificial Neural Networks, Part 1: The Database. in Journal of Ship Production and Design
Soc Naval Architects Marine Engineers, Jersey City., 33(3), 179-191.
https://doi.org/10.5957/JSPD.33.3.160015

Radojčić D, Zgradić AB, Kalajdžić M, Simić A. Resistance and Trim Modeling of a Systematic Planing Hull Series 62 (with 12.5 degrees, 25 degrees, and 30 degrees Deadrise Angles) Using Artificial Neural Networks, Part 1: The Database. in Journal of Ship Production and Design. 2017;33(3):179-191.
doi:10.5957/JSPD.33.3.160015 .

Radojčić, Dejan , Zgradić, Antonio B., Kalajdžić, Milan, Simić, Aleksandar, "Resistance and Trim Modeling of a Systematic Planing Hull Series 62 (with 12.5 degrees, 25 degrees, and 30 degrees Deadrise Angles) Using Artificial Neural Networks, Part 1: The Database" in Journal of Ship Production and Design, 33, no. 3 (2017):179-191,
https://doi.org/10.5957/JSPD.33.3.160015 . .

TY  - CONF
AU  - Radojčić, Dejan
AU  - Kalajdžić, Milan
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6726
AB  - An Artificial Neural Network (ANN) method with multiple outputs is used to develop the mathematical models for the Naples Systematic Series (NSS) of resistance (actually (RT/Δ)100000), dynamic trim (τ), wetted area (S/V2/3) and length of wetted area (LWL/LP), as functions of length beam ratio (LP/BPX), slenderness ratio (LP/V1/3), longitudinal centre of gravity (LCG/LP) and volumetric Froude number (FnV). Multiple ANN output feature enables simultaneous use of all the available (RT/Δ)100000 and τ data, producing both, an output for R/Δ and for τ. Similar results are obtained for the S/V2/3 and LWL/LP datasets. Note that the multiple output models share a common ANN structure, with only slight differences in equations for R/Δ & τ, and S/V2/3 & LWL/LP.
PB  - Università degli Studi di Napoli “Federico II”
C3  - Conference Proceedings - 11th International Conference High Speed Marine Vehicles (HSMV2017), Naples, 2017
T1  - Resistance and Trim Modeling of Naples Hard Chine Systematic Series
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6726
ER  - 

@conference{
author = "Radojčić, Dejan and Kalajdžić, Milan",
year = "2017",
abstract = "An Artificial Neural Network (ANN) method with multiple outputs is used to develop the mathematical models for the Naples Systematic Series (NSS) of resistance (actually (RT/Δ)100000), dynamic trim (τ), wetted area (S/V2/3) and length of wetted area (LWL/LP), as functions of length beam ratio (LP/BPX), slenderness ratio (LP/V1/3), longitudinal centre of gravity (LCG/LP) and volumetric Froude number (FnV). Multiple ANN output feature enables simultaneous use of all the available (RT/Δ)100000 and τ data, producing both, an output for R/Δ and for τ. Similar results are obtained for the S/V2/3 and LWL/LP datasets. Note that the multiple output models share a common ANN structure, with only slight differences in equations for R/Δ & τ, and S/V2/3 & LWL/LP.",
publisher = "Università degli Studi di Napoli “Federico II”",
journal = "Conference Proceedings - 11th International Conference High Speed Marine Vehicles (HSMV2017), Naples, 2017",
title = "Resistance and Trim Modeling of Naples Hard Chine Systematic Series",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6726"
}

Radojčić, D.,& Kalajdžić, M.. (2017). Resistance and Trim Modeling of Naples Hard Chine Systematic Series. in Conference Proceedings - 11th International Conference High Speed Marine Vehicles (HSMV2017), Naples, 2017
Università degli Studi di Napoli “Federico II”..
https://hdl.handle.net/21.15107/rcub_machinery_6726

Radojčić D, Kalajdžić M. Resistance and Trim Modeling of Naples Hard Chine Systematic Series. in Conference Proceedings - 11th International Conference High Speed Marine Vehicles (HSMV2017), Naples, 2017. 2017;.
https://hdl.handle.net/21.15107/rcub_machinery_6726 .

Radojčić, Dejan, Kalajdžić, Milan, "Resistance and Trim Modeling of Naples Hard Chine Systematic Series" in Conference Proceedings - 11th International Conference High Speed Marine Vehicles (HSMV2017), Naples, 2017 (2017),
https://hdl.handle.net/21.15107/rcub_machinery_6726 .

TY  - JOUR
AU  - Bačkalov, Igor
AU  - Rudaković, Stefan
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2555
AB  - Slobodni bok morskih brodova određuje se pomoću determinističkih odredbi Međunarodne konvencije o teretnoj vodnoj liniji. U ovom radu, međutim, koristi se probabilistički postupak kako bi se ocenio uticaj slobodnog boka na dinamičku stabilnost broda u oluji. Serijom numeričkih eksperimenata, procenjuje se verovatnoća gubitka stabiliteta malog višenamenskog teretnog broda izloženog istovremenom dejstvu neregularnih bočnih talasa i udara stohastički promenljivog bočnog vetra, pri čemu je visina slobodnog boka sistematski varirana. Uticaj slobodnog boka kvantifikovan je opsegom metacentarskih visina pri kojima se brod može smatrati stabilnim sa probabilističke tačke gledišta. Rad predstavlja korak ka uspostavljanju procedure čijom bi se upotrebom u postupku projektovanja mogla postići bolja ravnoteža između sigurnosti i ekonomičnosti broda. PR Projekat Ministarstva nauke Republike Srbije, br. TR35009. The research presented in the paper was performed within the framework of the project: Development of next generation of safe, efficient, ecological (SE-ECO) ships, executed by Department of Naval Architecture, Faculty of Mechanical Engineering University of Belgrade.
AB  - Freeboard assignment for seagoing vessels is carried out according to the deterministic provisions of the International Convention on Load Lines. In present investigation, however, an attempt is made to evaluate the influence of freeboard on the dynamic stability of ships in storms using a probabilistic approach. The probability of a stability failure of a small multipurpose cargo ship exposed to irregular beam waves and stochastic beam wind is estimated in a series of numerical experiments, whereby the freeboard of the examined vessel is systematically varied. The effect of freeboard is quantified in terms of a range of metacentric heights ensuring sufficient stability from the probabilistic point of view. The paper presents a step towards a procedure that could enable a better balance of safety and cost-efficiency in the ship design framework.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Probabilistička analiza uticaja slobodnog boka na stabilitet broda u oluji
T1  - Influence of freeboard on ship stability in rough weather: A probabilistic analysis
EP  - 50
IS  - 1
SP  - 45
VL  - 45
DO  - 10.5937/fmet1701045B
ER  - 

@article{
author = "Bačkalov, Igor and Rudaković, Stefan",
year = "2017",
abstract = "Slobodni bok morskih brodova određuje se pomoću determinističkih odredbi Međunarodne konvencije o teretnoj vodnoj liniji. U ovom radu, međutim, koristi se probabilistički postupak kako bi se ocenio uticaj slobodnog boka na dinamičku stabilnost broda u oluji. Serijom numeričkih eksperimenata, procenjuje se verovatnoća gubitka stabiliteta malog višenamenskog teretnog broda izloženog istovremenom dejstvu neregularnih bočnih talasa i udara stohastički promenljivog bočnog vetra, pri čemu je visina slobodnog boka sistematski varirana. Uticaj slobodnog boka kvantifikovan je opsegom metacentarskih visina pri kojima se brod može smatrati stabilnim sa probabilističke tačke gledišta. Rad predstavlja korak ka uspostavljanju procedure čijom bi se upotrebom u postupku projektovanja mogla postići bolja ravnoteža između sigurnosti i ekonomičnosti broda. PR Projekat Ministarstva nauke Republike Srbije, br. TR35009. The research presented in the paper was performed within the framework of the project: Development of next generation of safe, efficient, ecological (SE-ECO) ships, executed by Department of Naval Architecture, Faculty of Mechanical Engineering University of Belgrade., Freeboard assignment for seagoing vessels is carried out according to the deterministic provisions of the International Convention on Load Lines. In present investigation, however, an attempt is made to evaluate the influence of freeboard on the dynamic stability of ships in storms using a probabilistic approach. The probability of a stability failure of a small multipurpose cargo ship exposed to irregular beam waves and stochastic beam wind is estimated in a series of numerical experiments, whereby the freeboard of the examined vessel is systematically varied. The effect of freeboard is quantified in terms of a range of metacentric heights ensuring sufficient stability from the probabilistic point of view. The paper presents a step towards a procedure that could enable a better balance of safety and cost-efficiency in the ship design framework.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Probabilistička analiza uticaja slobodnog boka na stabilitet broda u oluji, Influence of freeboard on ship stability in rough weather: A probabilistic analysis",
pages = "50-45",
number = "1",
volume = "45",
doi = "10.5937/fmet1701045B"
}

Bačkalov, I.,& Rudaković, S.. (2017). Probabilistička analiza uticaja slobodnog boka na stabilitet broda u oluji. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 45(1), 45-50.
https://doi.org/10.5937/fmet1701045B

Bačkalov I, Rudaković S. Probabilistička analiza uticaja slobodnog boka na stabilitet broda u oluji. in FME Transactions. 2017;45(1):45-50.
doi:10.5937/fmet1701045B .

Bačkalov, Igor, Rudaković, Stefan, "Probabilistička analiza uticaja slobodnog boka na stabilitet broda u oluji" in FME Transactions, 45, no. 1 (2017):45-50,
https://doi.org/10.5937/fmet1701045B . .

TY  - CONF
AU  - Rudaković, Stefan
AU  - Bačkalov, Igor
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6917
AB  - Proper estimation of roll damping moment is of paramount importance for adequate assessment of dynamic stability of ships. However, experimental data on roll damping of inland vessels are scarce and unreliable. Thus the applicability of classic Ikeda's method and its simplified version on typical European inland vessels is investigated, with specific focus on eddy making component. It is found that the simplified Ikeda's method, in comparison to the classic method, may considerably underestimate the eddy making component of damping of full hull forms, or even return negative values, although the block coefficient is within the limits of method applicability. Hence, the paper explores possibilities of adjusting the simplified Ikeda's method in order to improve the observed shortcoming, as well as to extend its application to stability analysis of inland ships.
C3  - Proceedings of the 16th International Ship Stability Workshop (ISSW16)
T1  - On application of standard methods for roll damping prediction to inland vessels
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6917
ER  - 

@conference{
author = "Rudaković, Stefan and Bačkalov, Igor",
year = "2016",
abstract = "Proper estimation of roll damping moment is of paramount importance for adequate assessment of dynamic stability of ships. However, experimental data on roll damping of inland vessels are scarce and unreliable. Thus the applicability of classic Ikeda's method and its simplified version on typical European inland vessels is investigated, with specific focus on eddy making component. It is found that the simplified Ikeda's method, in comparison to the classic method, may considerably underestimate the eddy making component of damping of full hull forms, or even return negative values, although the block coefficient is within the limits of method applicability. Hence, the paper explores possibilities of adjusting the simplified Ikeda's method in order to improve the observed shortcoming, as well as to extend its application to stability analysis of inland ships.",
journal = "Proceedings of the 16th International Ship Stability Workshop (ISSW16)",
title = "On application of standard methods for roll damping prediction to inland vessels",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6917"
}

Rudaković, S.,& Bačkalov, I.. (2016). On application of standard methods for roll damping prediction to inland vessels. in Proceedings of the 16th International Ship Stability Workshop (ISSW16).
https://hdl.handle.net/21.15107/rcub_machinery_6917

Rudaković S, Bačkalov I. On application of standard methods for roll damping prediction to inland vessels. in Proceedings of the 16th International Ship Stability Workshop (ISSW16). 2016;.
https://hdl.handle.net/21.15107/rcub_machinery_6917 .

Rudaković, Stefan, Bačkalov, Igor, "On application of standard methods for roll damping prediction to inland vessels" in Proceedings of the 16th International Ship Stability Workshop (ISSW16) (2016),
https://hdl.handle.net/21.15107/rcub_machinery_6917 .

TY  - JOUR
AU  - Bačkalov, Igor
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2218
AB  - Directive 2006/87/EC of the European Parliament and the Council represents a milestone in the on-going process of harmonization of technical standards for inland vessels in Europe. The Directive prescribes various safety requirements for freight and passenger vessels operating on the European inland waterways. This paper focuses on ship stability regulations laid out in the Directive 2006/87/EC in relation to the safety of shallow-draught inland container vessels designed for the Danube. Using the probabilistic analysis of stability of inland vessels exposed to stochastic beam wind, it is demonstrated that deterministic regulations imposed by the Directive fail to provide sufficient level of safety in a number of relevant cases. In addition, the paper presents an overview of environmental conditions used in safety analyses, as prescribed by diverse regulations presently in effect in Europe. It is shown that different rules may apply in the same area of navigation which subsequently leads to unequal safety levels attained by the vessels operating in given waterway. Therefore, the paper offers a universal risk-based alternative to the current safety rules, based on the statistical analysis of roll motion of a vessel in realistic weather conditions.
PB  - Elsevier Science Bv, Amsterdam
T2  - Safety Science
T1  - Impact of contemporary ship stability regulations on safety of shallow-draught inland container vessels
EP  - 115
SP  - 105
VL  - 72
DO  - 10.1016/j.ssci.2014.09.001
ER  - 

@article{
author = "Bačkalov, Igor",
year = "2015",
abstract = "Directive 2006/87/EC of the European Parliament and the Council represents a milestone in the on-going process of harmonization of technical standards for inland vessels in Europe. The Directive prescribes various safety requirements for freight and passenger vessels operating on the European inland waterways. This paper focuses on ship stability regulations laid out in the Directive 2006/87/EC in relation to the safety of shallow-draught inland container vessels designed for the Danube. Using the probabilistic analysis of stability of inland vessels exposed to stochastic beam wind, it is demonstrated that deterministic regulations imposed by the Directive fail to provide sufficient level of safety in a number of relevant cases. In addition, the paper presents an overview of environmental conditions used in safety analyses, as prescribed by diverse regulations presently in effect in Europe. It is shown that different rules may apply in the same area of navigation which subsequently leads to unequal safety levels attained by the vessels operating in given waterway. Therefore, the paper offers a universal risk-based alternative to the current safety rules, based on the statistical analysis of roll motion of a vessel in realistic weather conditions.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Safety Science",
title = "Impact of contemporary ship stability regulations on safety of shallow-draught inland container vessels",
pages = "115-105",
volume = "72",
doi = "10.1016/j.ssci.2014.09.001"
}

Bačkalov, I.. (2015). Impact of contemporary ship stability regulations on safety of shallow-draught inland container vessels. in Safety Science
Elsevier Science Bv, Amsterdam., 72, 105-115.
https://doi.org/10.1016/j.ssci.2014.09.001

Bačkalov I. Impact of contemporary ship stability regulations on safety of shallow-draught inland container vessels. in Safety Science. 2015;72:105-115.
doi:10.1016/j.ssci.2014.09.001 .

Bačkalov, Igor, "Impact of contemporary ship stability regulations on safety of shallow-draught inland container vessels" in Safety Science, 72 (2015):105-115,
https://doi.org/10.1016/j.ssci.2014.09.001 . .

TY  - THES
AU  - Momčilović, Nikola
PY  - 2014
UR  - https://nardus.mpn.gov.rs/handle/123456789/5049
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=2692
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:10807/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=514548643
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/29
AB  - Problemi ponašanja orebrenih ploča (panela), kao osnovnih jedinica brodskih  konstrukcija predstavljaju jednu od najznačajnijih istraživačkih tema iz  oblasti čvrstoće brodskih konsktrukcija.  U ovom radu orebrene ploče modelirane su neorebrenim pločama, sa ciljem da se  odzivi i jedne i d ruge u š to v ećoj m eri p odudaraju. U t u s vrhu r azvijena j e  procedura (metoda ekvivalencije) kojom se za svaku orebrenu ploču mogu  proračunati parametri elastičnosti neorebrene ploče, tako da maskimalni  ugibi i naponi, u obe ploče, budu jednaki. Ovo podrazumeva i definisanje  ekvivalentnog konačnog elementa ploče koji u svojoj matrici krutosti,  homogenizuje osobine ploče i ukrućenja. Razvijeni matematički algoritam uzima  u obzir upotrebu teorije ortotorpnih ploča i metode konačnih elemenata.  S o bzirom d a j e t rup b roda sastavljen od velikog broja orebrenih ploča, svrha  modeliranja čvrstoće ekvivalentnim pločama svakako je formiranje numeričkog  modela brodske konstrukcije sa redukovanim brojem elemenata i stepeni  slobode. Ovaj model, za razliku od konvecnionalnog, ne poseduje ukrućenja, samo  ekvivalentne neorebrene ploče. Poređenjem konkretnog numeričkog modela trupa  broda sastavljenog od konvencionalnih konačnih elemenata i onog od novih,  ekvivaletnih elemenata, dobijena je jasnija slika o primeni, prednostima i  manama razvijene metode. Cilj rada je da se upotrebom metode ekvivalencije,  pojednostavi strukturno modeliranje velikih numeričkih modela brodske  konksturkcije, bez značajnijih gubitaka u kvalitetu analize, odnosno određenim  pomeranjima i naponima u konsturkciji. Takođe je urađena i serija merenja na konkretnim modelima orebrenih ploča da  bi se utvrdila generalna razlika u odzivima realne konsktrukcije u odnosu na  odziv dobijen primenom metode konačnih elemenata, imajući u vidu da se ova  numerička metoda koristi u okviru metode ekvivalencije.
AB  - One of the most important research topic in the field of ship strength analysis is the  problem of structural behavior of stiffened plates (panels), as the basic units of ship  structures.  In this paper, stiffened plates are modeled as unstiffened ones, with the purpose to  achieve the compliance in their structural response, as much as possible. Therefore, the  procedure (equivalence method) is developed in order to obtain elasticity parameters of  unsiffened plates so that maximum displacements and stresses would be the same in  both plates. Furthermore, an equivalent finite element is defined. This element has  stiffness matrix that homogenize the mechanical prorerties of both plate and stiffener.  Developed mathematical algorithm takes into account application of orthotropic plate  theory and finite element method.  Considering that ship hull consists of large number of stiffened plates, the goal of  equivalent plate strength modeling is to form a numerical model of ship structure with a  reduced number of elements and degrees of freedom. This model, apart from  convencional one, does not have stiffeners, just equivalent unstiffened plates.  Comparing the specific numerical model of ship structure that consists of conventional  finite elements and one that consists of new, equivalent elements, one can get more  clear view on application, advanteges and disadvantages of developed method. The goal  of this thesis is to simplify structural modelling of large numerical models of ship  strucutures, without any significant loss in quality of the analysis, namely resulting  displacements and stresses.  Furthermore, a series of measurements is performed on specific models of stiffened  plates in order to achieve general comparison of the structural response of real structure as opposed to numerically modeled one, especially having in mind that finite element  method is incportporeted in equivalence method.
PB  - Univerzitet u Beogradu, Mašinski fakultet
T1  - Modeliranje čvrstoće ortotropnih panela brodske konstrukcije ekvivalentnim neorebrenim pločama
T1  - Strength modelling of orthotropic ship structure panels by equivalent unstiffened plates
UR  - https://hdl.handle.net/21.15107/rcub_nardus_5049
ER  - 

@phdthesis{
author = "Momčilović, Nikola",
year = "2014",
abstract = "Problemi ponašanja orebrenih ploča (panela), kao osnovnih jedinica brodskih  konstrukcija predstavljaju jednu od najznačajnijih istraživačkih tema iz  oblasti čvrstoće brodskih konsktrukcija.  U ovom radu orebrene ploče modelirane su neorebrenim pločama, sa ciljem da se  odzivi i jedne i d ruge u š to v ećoj m eri p odudaraju. U t u s vrhu r azvijena j e  procedura (metoda ekvivalencije) kojom se za svaku orebrenu ploču mogu  proračunati parametri elastičnosti neorebrene ploče, tako da maskimalni  ugibi i naponi, u obe ploče, budu jednaki. Ovo podrazumeva i definisanje  ekvivalentnog konačnog elementa ploče koji u svojoj matrici krutosti,  homogenizuje osobine ploče i ukrućenja. Razvijeni matematički algoritam uzima  u obzir upotrebu teorije ortotorpnih ploča i metode konačnih elemenata.  S o bzirom d a j e t rup b roda sastavljen od velikog broja orebrenih ploča, svrha  modeliranja čvrstoće ekvivalentnim pločama svakako je formiranje numeričkog  modela brodske konstrukcije sa redukovanim brojem elemenata i stepeni  slobode. Ovaj model, za razliku od konvecnionalnog, ne poseduje ukrućenja, samo  ekvivalentne neorebrene ploče. Poređenjem konkretnog numeričkog modela trupa  broda sastavljenog od konvencionalnih konačnih elemenata i onog od novih,  ekvivaletnih elemenata, dobijena je jasnija slika o primeni, prednostima i  manama razvijene metode. Cilj rada je da se upotrebom metode ekvivalencije,  pojednostavi strukturno modeliranje velikih numeričkih modela brodske  konksturkcije, bez značajnijih gubitaka u kvalitetu analize, odnosno određenim  pomeranjima i naponima u konsturkciji. Takođe je urađena i serija merenja na konkretnim modelima orebrenih ploča da  bi se utvrdila generalna razlika u odzivima realne konsktrukcije u odnosu na  odziv dobijen primenom metode konačnih elemenata, imajući u vidu da se ova  numerička metoda koristi u okviru metode ekvivalencije., One of the most important research topic in the field of ship strength analysis is the  problem of structural behavior of stiffened plates (panels), as the basic units of ship  structures.  In this paper, stiffened plates are modeled as unstiffened ones, with the purpose to  achieve the compliance in their structural response, as much as possible. Therefore, the  procedure (equivalence method) is developed in order to obtain elasticity parameters of  unsiffened plates so that maximum displacements and stresses would be the same in  both plates. Furthermore, an equivalent finite element is defined. This element has  stiffness matrix that homogenize the mechanical prorerties of both plate and stiffener.  Developed mathematical algorithm takes into account application of orthotropic plate  theory and finite element method.  Considering that ship hull consists of large number of stiffened plates, the goal of  equivalent plate strength modeling is to form a numerical model of ship structure with a  reduced number of elements and degrees of freedom. This model, apart from  convencional one, does not have stiffeners, just equivalent unstiffened plates.  Comparing the specific numerical model of ship structure that consists of conventional  finite elements and one that consists of new, equivalent elements, one can get more  clear view on application, advanteges and disadvantages of developed method. The goal  of this thesis is to simplify structural modelling of large numerical models of ship  strucutures, without any significant loss in quality of the analysis, namely resulting  displacements and stresses.  Furthermore, a series of measurements is performed on specific models of stiffened  plates in order to achieve general comparison of the structural response of real structure as opposed to numerically modeled one, especially having in mind that finite element  method is incportporeted in equivalence method.",
publisher = "Univerzitet u Beogradu, Mašinski fakultet",
title = "Modeliranje čvrstoće ortotropnih panela brodske konstrukcije ekvivalentnim neorebrenim pločama, Strength modelling of orthotropic ship structure panels by equivalent unstiffened plates",
url = "https://hdl.handle.net/21.15107/rcub_nardus_5049"
}

Momčilović, N.. (2014). Modeliranje čvrstoće ortotropnih panela brodske konstrukcije ekvivalentnim neorebrenim pločama. 
Univerzitet u Beogradu, Mašinski fakultet..
https://hdl.handle.net/21.15107/rcub_nardus_5049

Momčilović N. Modeliranje čvrstoće ortotropnih panela brodske konstrukcije ekvivalentnim neorebrenim pločama. 2014;.
https://hdl.handle.net/21.15107/rcub_nardus_5049 .

Momčilović, Nikola, "Modeliranje čvrstoće ortotropnih panela brodske konstrukcije ekvivalentnim neorebrenim pločama" (2014),
https://hdl.handle.net/21.15107/rcub_nardus_5049 .

TY  - THES
AU  - Kalajdžić, Milan
PY  - 2014
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=3601
UR  - https://nardus.mpn.gov.rs/handle/123456789/6239
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:12360/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=514521507
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/28
AB  - U radu je razvijen inovativni postupak za proračun kretanja jedrilice pod uticajem promenljivog, haotičnog vetra u vodenoj struji. Postupak omogućava procenu optimalnog položaja jedara tokom njenog nestacionarnog kretanja. Primenjeni metod je baziran na dugogodišnjem istraživanju u kojem se autor bavio uticajem promenljivog vetra na dinamički stabilitet broda. Ovakvim pristupom proširen je klasični postupak predviđanja brzine jedrilice pri konstantnom vetru. Algebarske jednačine se, na taj način, pretvaraju u nelinearne spregnute diferencijalne jednačine kretanja jedrilice i time analiza postaje mnogo zahtevnija. Ipak, postupak vodi kroz sve komplikovane probleme, i omogućava glavni cilj: određivanje zaletanje, zanošenja i valjanja jedrilice tokom vremena pod uticajem promenljivog vetra i vodene struje. Postupak se može primeniti za različite položaje jedara: konstantan tokom kretanja, ili promenljiv, koji prati optimum u odnosu na vetar. Pomoću stohastičke analize dobijenih rezultata, takođe se mogu odrediti, porediti i analizirati srednja brzina plovidbe, srednji nagib, ugao zanošenja jedrilice. Vetar je, generalno, vremenski zavistan fenomen, tako da (zbog promenljive sile vetra) kretanje jedrilice ne može biti stacionarno. Uprkos tome, u većini istraživanja, performanse jedrilice (njena brzina, zanošenje, itd.) smatraju se konstantnim, a uticaj udara vetra se zanemaruje. Prikazano istrživanje primenjuje inovativne tehnike razvijene u analizi uticaja promenljivog vetra na stabilitet i sigurnost broda, a analiza obuhvata udare vetra i posledice nestacionarnog kretanje jedrilice. Takođe, kao osnovni slučaj rešava se i stacionarno kretanje jedrilice, sa i bez uticaja vodene struje, za konstanstan vetar i rezultati se prikazuju u formi polarnih dijagrama. Osnovna procedura je, ukratko, sledeće. Za pretpostavljene složene uslove nestacionarnog kretanja jedrilice pod dejstvom haotičnog vetra u vodenoj struji, rešavaju se spregnute nelinearne diferencijalne jednačine plovidbe iii jedrilice sa tri stepena slobode kretanja. Promenljiva brzina vetra se određuje iz odgovarajućih semi-empirijskih spektara vetra, proračunava se prividna brzina vetra i odgovarajući vremenski zavisne sile i momenti vetra. Hidrodinamičke sile koje deluju na trup jedrilice, određuju se na bazi semi- empirijskih polinoma tzv. Delftske serije jedrilica, pri čemu se, kao merodavna brzina, uzima relativna brzina jedrilice u odnosu na brzinu vode. Diferencijalne jednačine kretanja se rešavaju numeričkim putem, i određuje zaletanje, valjanje, zanošenje i zakretanje jedrilice u funkciji vremena. Vrši se stohastička analiza dobijenih kretanja, i traži srednja brzina plovidbe, zanošenja, itd. pod različitim uslovima – u slučaju da se jedra postave u fiksan (optimalan) položaj u odnosu na stacionarno kretanje, i u slučaju da je položaj jedara promenljiv, i da odgovara trenutnom optimumu. Analizira se uticaj brzine i pravca vetra, brzine i pravca vodene struje, položaja jedara, i određuje se povećanje srednje brzine plovidbe koje se postiže pravilnim pozicioniranjem jedara tokom realnog, nestacionarnog jedrenja...
AB  - The thesis develops an innovative procedure for prediction of sailing yacht motion in water current due to changeable, gusting wind. In addition, the method enables the assessment of optimal position of sails throughout unsteady yacht's motion. Method is based on long-term investigations done by the author in the field of gusting wind influence on ship dynamic stability. The classical procedure for prediction of sailing yacht velocity in constant wind is extended by this novel approach. Algebraic equations are, in that way, transformed to nonlinear coupled differential equation of yacht motion, so the analysis became much more challenging. The procedure leads to a perplex problem, but still enables the main goal: the prediction of sailing yacht unsteady surge, sway and roll in gusting wind аnd water currеnt. This could be done for different position of sails: constant throughout the motion, or changeable, adjusted optimally to the instantaneous wind. By stochastic analysis of the obtained results, the mean vessel velocity, her mean heel, mean leeway angle, could be assessed, compared and analyzed. The wind is, generally, a time dependent phenomenon, so (due to the changeable wind forces) a sailing yacht motion cannot be stationary. In spite of that, in a great majority of investigations, the sailing yacht performances (her speed, list etc.) are considered constant, and the influences of wind gusts are neglected. The present investigation exploits the innovative techniques developed in the analysis of gusting wind influence on ship stability and safety, and includes the wind gusts and the consequent non-stationary yacht motion into the analysis. Also, as a base case, steady motion of sailing yacht in constant wind with, and without the impact of water current is solved, and presented in the form of polar diagrams. The basic procedure is, briefly, the following. For assumed complex conditions of unsteady sailing yacht motion under the influence of gusting wind and water current, coupled nonlinear differential equations of yacht motion with three degrees of freedom are derived and solved. The changeable wind speed is assessed from appropriate semiempirical wind spectrums, and the time-dependent wind forces and moments v (depending on the apparent wind speed) are included into nonlinear differential equations of yacht’s motion. Hydrodynamic forces acting on the hull are determined on the basis of semi-empirical polynomial of, so called, Delft yacht series, where, yacht speed relative to water is taken as the representative speed. The differential equations are solved numerically, giving the time-history of vessel surge, sway and roll. From the obtained data, the mean vessel speed, her mean list, etc. are derived by a detailed stochastic analysis for a variety of conditions - in case of sails placed in a fixed (optimal) position relative to the stationary motion, and in case of (unsteady) position corresponding to the current optimum. The influence of intensity and direction of wind and water current are analysed, and the increase of mean yacht speed due to proper positioning of sails is determined...
PB  - Univerzitet u Beogradu, Mašinski fakultet
T1  - Kretanje jedrilice pod dejstvom promenljivog vetra
T1  - Sailing yacht motion in gusting wind
UR  - https://hdl.handle.net/21.15107/rcub_nardus_6239
ER  - 

@phdthesis{
author = "Kalajdžić, Milan",
year = "2014",
abstract = "U radu je razvijen inovativni postupak za proračun kretanja jedrilice pod uticajem promenljivog, haotičnog vetra u vodenoj struji. Postupak omogućava procenu optimalnog položaja jedara tokom njenog nestacionarnog kretanja. Primenjeni metod je baziran na dugogodišnjem istraživanju u kojem se autor bavio uticajem promenljivog vetra na dinamički stabilitet broda. Ovakvim pristupom proširen je klasični postupak predviđanja brzine jedrilice pri konstantnom vetru. Algebarske jednačine se, na taj način, pretvaraju u nelinearne spregnute diferencijalne jednačine kretanja jedrilice i time analiza postaje mnogo zahtevnija. Ipak, postupak vodi kroz sve komplikovane probleme, i omogućava glavni cilj: određivanje zaletanje, zanošenja i valjanja jedrilice tokom vremena pod uticajem promenljivog vetra i vodene struje. Postupak se može primeniti za različite položaje jedara: konstantan tokom kretanja, ili promenljiv, koji prati optimum u odnosu na vetar. Pomoću stohastičke analize dobijenih rezultata, takođe se mogu odrediti, porediti i analizirati srednja brzina plovidbe, srednji nagib, ugao zanošenja jedrilice. Vetar je, generalno, vremenski zavistan fenomen, tako da (zbog promenljive sile vetra) kretanje jedrilice ne može biti stacionarno. Uprkos tome, u većini istraživanja, performanse jedrilice (njena brzina, zanošenje, itd.) smatraju se konstantnim, a uticaj udara vetra se zanemaruje. Prikazano istrživanje primenjuje inovativne tehnike razvijene u analizi uticaja promenljivog vetra na stabilitet i sigurnost broda, a analiza obuhvata udare vetra i posledice nestacionarnog kretanje jedrilice. Takođe, kao osnovni slučaj rešava se i stacionarno kretanje jedrilice, sa i bez uticaja vodene struje, za konstanstan vetar i rezultati se prikazuju u formi polarnih dijagrama. Osnovna procedura je, ukratko, sledeće. Za pretpostavljene složene uslove nestacionarnog kretanja jedrilice pod dejstvom haotičnog vetra u vodenoj struji, rešavaju se spregnute nelinearne diferencijalne jednačine plovidbe iii jedrilice sa tri stepena slobode kretanja. Promenljiva brzina vetra se određuje iz odgovarajućih semi-empirijskih spektara vetra, proračunava se prividna brzina vetra i odgovarajući vremenski zavisne sile i momenti vetra. Hidrodinamičke sile koje deluju na trup jedrilice, određuju se na bazi semi- empirijskih polinoma tzv. Delftske serije jedrilica, pri čemu se, kao merodavna brzina, uzima relativna brzina jedrilice u odnosu na brzinu vode. Diferencijalne jednačine kretanja se rešavaju numeričkim putem, i određuje zaletanje, valjanje, zanošenje i zakretanje jedrilice u funkciji vremena. Vrši se stohastička analiza dobijenih kretanja, i traži srednja brzina plovidbe, zanošenja, itd. pod različitim uslovima – u slučaju da se jedra postave u fiksan (optimalan) položaj u odnosu na stacionarno kretanje, i u slučaju da je položaj jedara promenljiv, i da odgovara trenutnom optimumu. Analizira se uticaj brzine i pravca vetra, brzine i pravca vodene struje, položaja jedara, i određuje se povećanje srednje brzine plovidbe koje se postiže pravilnim pozicioniranjem jedara tokom realnog, nestacionarnog jedrenja..., The thesis develops an innovative procedure for prediction of sailing yacht motion in water current due to changeable, gusting wind. In addition, the method enables the assessment of optimal position of sails throughout unsteady yacht's motion. Method is based on long-term investigations done by the author in the field of gusting wind influence on ship dynamic stability. The classical procedure for prediction of sailing yacht velocity in constant wind is extended by this novel approach. Algebraic equations are, in that way, transformed to nonlinear coupled differential equation of yacht motion, so the analysis became much more challenging. The procedure leads to a perplex problem, but still enables the main goal: the prediction of sailing yacht unsteady surge, sway and roll in gusting wind аnd water currеnt. This could be done for different position of sails: constant throughout the motion, or changeable, adjusted optimally to the instantaneous wind. By stochastic analysis of the obtained results, the mean vessel velocity, her mean heel, mean leeway angle, could be assessed, compared and analyzed. The wind is, generally, a time dependent phenomenon, so (due to the changeable wind forces) a sailing yacht motion cannot be stationary. In spite of that, in a great majority of investigations, the sailing yacht performances (her speed, list etc.) are considered constant, and the influences of wind gusts are neglected. The present investigation exploits the innovative techniques developed in the analysis of gusting wind influence on ship stability and safety, and includes the wind gusts and the consequent non-stationary yacht motion into the analysis. Also, as a base case, steady motion of sailing yacht in constant wind with, and without the impact of water current is solved, and presented in the form of polar diagrams. The basic procedure is, briefly, the following. For assumed complex conditions of unsteady sailing yacht motion under the influence of gusting wind and water current, coupled nonlinear differential equations of yacht motion with three degrees of freedom are derived and solved. The changeable wind speed is assessed from appropriate semiempirical wind spectrums, and the time-dependent wind forces and moments v (depending on the apparent wind speed) are included into nonlinear differential equations of yacht’s motion. Hydrodynamic forces acting on the hull are determined on the basis of semi-empirical polynomial of, so called, Delft yacht series, where, yacht speed relative to water is taken as the representative speed. The differential equations are solved numerically, giving the time-history of vessel surge, sway and roll. From the obtained data, the mean vessel speed, her mean list, etc. are derived by a detailed stochastic analysis for a variety of conditions - in case of sails placed in a fixed (optimal) position relative to the stationary motion, and in case of (unsteady) position corresponding to the current optimum. The influence of intensity and direction of wind and water current are analysed, and the increase of mean yacht speed due to proper positioning of sails is determined...",
publisher = "Univerzitet u Beogradu, Mašinski fakultet",
title = "Kretanje jedrilice pod dejstvom promenljivog vetra, Sailing yacht motion in gusting wind",
url = "https://hdl.handle.net/21.15107/rcub_nardus_6239"
}

Kalajdžić, M.. (2014). Kretanje jedrilice pod dejstvom promenljivog vetra. 
Univerzitet u Beogradu, Mašinski fakultet..
https://hdl.handle.net/21.15107/rcub_nardus_6239

Kalajdžić M. Kretanje jedrilice pod dejstvom promenljivog vetra. 2014;.
https://hdl.handle.net/21.15107/rcub_nardus_6239 .

Kalajdžić, Milan, "Kretanje jedrilice pod dejstvom promenljivog vetra" (2014),
https://hdl.handle.net/21.15107/rcub_nardus_6239 .

TY  - JOUR
AU  - Simić, Aleksandar
AU  - Radojčić, Dejan
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1769
AB  - Da bi se u fazi projektovanja broda analizirao uticaj forme i primenjenih tehničkih rešenja na energetsku efikasnost, potkomitet IMO-a zadužen za zaštitu životne sredine (MERS) predložio je u uvođenje tzv. indeksa energetske efikasnosti pri projektovanju (EEDI). Predloženi pokazatelj predstavlja odnos mase ugljen-dioksida emitovanog u atmosferu, i količine tereta koja je pri tome prevezena po kilometru. Za neke tipove morskih brodova već su razvijene jednačine koje određuju referentne vrednosti za EEDI. U ovom radu je predstavljen jedan od prvih pokušaja procene vrednosti ovog indeksa za rečne samohodne teretne brodove. U toku istraživanja su sprovedena ispitivanja rečnih samohotki na plovnom putu u realnim okolnostima. Proširena je baza podataka i na osnovu nje je razvijen novi matematički model za procenu potrebne snage motora u zavisnosti od osnovnih dimenzija broda i ograničenja plovnog puta. Analizirane su i značajne razlike između rezultata modelskih ispitivanja i ispitivanja brodova u prirodnoj veličini, a na osnovu čega je procenjena vrednost tzv. dodatka za službu. U radu je predložen približan postupak za određivanje koeficijenata propulzije na osnovu ispitivanja apsorpcije snage broda. Konačno, nagovešten je način na koji se mogu odrediti referentne vrednosti indeksa EEDI koje bi mogle da se koriste pri projektovanju brodova ovog tipa.
AB  - The Energy Efficiency Design Index (EEDI) was introduced by IMO - Marine Environment Protection Committee in order to stimulate innovation and technical development of all elements that influence energy efficiency of a ship from its design phase. According to definition, it represents weight of ship’s CO2 emissions per transport work. Baseline equations for EEDI were developed for several most common types of seagoing ships. This paper presents one of the first attempts to evaluate EEDI of inland-waterway, dry-cargo, self-propelled vessels. Within research that is explained in the paper, full-scale measurements were performed with the purpose to enrich the database according to which new mathematical model for power evaluation was developed. Large differences between the model- and full-scale measurements were also analysed. Finally, application of relatively large power margins for inland-waterway ships was suggested. EEDI baseline can be used as a benchmark of future ship designs.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - O energetskoj efikasnost rečnih samohodnih teretnih brodova
T1  - On energy efficiency of inland waterway self-propelled cargo vessels
EP  - 145
IS  - 2
SP  - 138
VL  - 41
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1769
ER  - 

@article{
author = "Simić, Aleksandar and Radojčić, Dejan",
year = "2013",
abstract = "Da bi se u fazi projektovanja broda analizirao uticaj forme i primenjenih tehničkih rešenja na energetsku efikasnost, potkomitet IMO-a zadužen za zaštitu životne sredine (MERS) predložio je u uvođenje tzv. indeksa energetske efikasnosti pri projektovanju (EEDI). Predloženi pokazatelj predstavlja odnos mase ugljen-dioksida emitovanog u atmosferu, i količine tereta koja je pri tome prevezena po kilometru. Za neke tipove morskih brodova već su razvijene jednačine koje određuju referentne vrednosti za EEDI. U ovom radu je predstavljen jedan od prvih pokušaja procene vrednosti ovog indeksa za rečne samohodne teretne brodove. U toku istraživanja su sprovedena ispitivanja rečnih samohotki na plovnom putu u realnim okolnostima. Proširena je baza podataka i na osnovu nje je razvijen novi matematički model za procenu potrebne snage motora u zavisnosti od osnovnih dimenzija broda i ograničenja plovnog puta. Analizirane su i značajne razlike između rezultata modelskih ispitivanja i ispitivanja brodova u prirodnoj veličini, a na osnovu čega je procenjena vrednost tzv. dodatka za službu. U radu je predložen približan postupak za određivanje koeficijenata propulzije na osnovu ispitivanja apsorpcije snage broda. Konačno, nagovešten je način na koji se mogu odrediti referentne vrednosti indeksa EEDI koje bi mogle da se koriste pri projektovanju brodova ovog tipa., The Energy Efficiency Design Index (EEDI) was introduced by IMO - Marine Environment Protection Committee in order to stimulate innovation and technical development of all elements that influence energy efficiency of a ship from its design phase. According to definition, it represents weight of ship’s CO2 emissions per transport work. Baseline equations for EEDI were developed for several most common types of seagoing ships. This paper presents one of the first attempts to evaluate EEDI of inland-waterway, dry-cargo, self-propelled vessels. Within research that is explained in the paper, full-scale measurements were performed with the purpose to enrich the database according to which new mathematical model for power evaluation was developed. Large differences between the model- and full-scale measurements were also analysed. Finally, application of relatively large power margins for inland-waterway ships was suggested. EEDI baseline can be used as a benchmark of future ship designs.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "O energetskoj efikasnost rečnih samohodnih teretnih brodova, On energy efficiency of inland waterway self-propelled cargo vessels",
pages = "145-138",
number = "2",
volume = "41",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1769"
}

Simić, A.,& Radojčić, D.. (2013). O energetskoj efikasnost rečnih samohodnih teretnih brodova. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 41(2), 138-145.
https://hdl.handle.net/21.15107/rcub_machinery_1769

Simić A, Radojčić D. O energetskoj efikasnost rečnih samohodnih teretnih brodova. in FME Transactions. 2013;41(2):138-145.
https://hdl.handle.net/21.15107/rcub_machinery_1769 .

Simić, Aleksandar, Radojčić, Dejan, "O energetskoj efikasnost rečnih samohodnih teretnih brodova" in FME Transactions, 41, no. 2 (2013):138-145,
https://hdl.handle.net/21.15107/rcub_machinery_1769 .