TY  - CONF
AU  - Gnjatović, Nebojša
AU  - Bošnjak, Srđan
AU  - Milenović, Ivan Lj.
AU  - Stefanović, Aleksandar Z.
AU  - Urošević, Marko
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5001
AB  - Stackers-reclaimers represent the mechanization backbone of high-capacity storages for granular materials. The paper presents the design of a gantry bucket chain stackers-reclaimer for handling of crushed gypsum, as well as the working technology, finite element strength calculation for the main substructures: the working device, the trolley and the gantry. Failureless operation of the presented stacker-reclaimer represent an indirect validation of not only the presented results, but also the entire project as well as the applied technology of manufacture and montage.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - Proceedings of the XXIV International Conference MHCL’22
T1  - Gantry Bucket Chain Stacker- Reclaimer for Crushed Gypsum
EP  - 60
SP  - 55
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5001
ER  - 

@conference{
author = "Gnjatović, Nebojša and Bošnjak, Srđan and Milenović, Ivan Lj. and Stefanović, Aleksandar Z. and Urošević, Marko",
year = "2022",
abstract = "Stackers-reclaimers represent the mechanization backbone of high-capacity storages for granular materials. The paper presents the design of a gantry bucket chain stackers-reclaimer for handling of crushed gypsum, as well as the working technology, finite element strength calculation for the main substructures: the working device, the trolley and the gantry. Failureless operation of the presented stacker-reclaimer represent an indirect validation of not only the presented results, but also the entire project as well as the applied technology of manufacture and montage.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "Proceedings of the XXIV International Conference MHCL’22",
title = "Gantry Bucket Chain Stacker- Reclaimer for Crushed Gypsum",
pages = "60-55",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5001"
}

Gnjatović, N., Bošnjak, S., Milenović, I. Lj., Stefanović, A. Z.,& Urošević, M.. (2022). Gantry Bucket Chain Stacker- Reclaimer for Crushed Gypsum. in Proceedings of the XXIV International Conference MHCL’22
University of Belgrade, Faculty of Mechanical Engineering., 55-60.
https://hdl.handle.net/21.15107/rcub_machinery_5001

Gnjatović N, Bošnjak S, Milenović IL, Stefanović AZ, Urošević M. Gantry Bucket Chain Stacker- Reclaimer for Crushed Gypsum. in Proceedings of the XXIV International Conference MHCL’22. 2022;:55-60.
https://hdl.handle.net/21.15107/rcub_machinery_5001 .

Gnjatović, Nebojša, Bošnjak, Srđan, Milenović, Ivan Lj., Stefanović, Aleksandar Z., Urošević, Marko, "Gantry Bucket Chain Stacker- Reclaimer for Crushed Gypsum" in Proceedings of the XXIV International Conference MHCL’22 (2022):55-60,
https://hdl.handle.net/21.15107/rcub_machinery_5001 .

TY  - CONF
AU  - Stefanović, Aleksandar Z.
AU  - Gnjatović, Nebojša
AU  - Milojević, Goran
AU  - Đenadić, Stevan
AU  - Urošević, Marko
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4999
AB  - Bucket wheel excavators (BWEs) are the largest mobile terrestrial machines exposed to the working loads of a periodic character. This paper presents a small portion of the studies, conducted with the goal of proposing a new idea regarding preservation of the load-carrying
structures of these machines, based on the implementation of a controllable frequency-controlled drive of the excavating device. A detailed analysis of the dynamic response of the load-carrying structure is required in order to determine the domains of frequency of revolutions of the working device's driving motor where the dynamic response of the structure is favorable, and therefore successfully implement this idea. A methodologically-original study was conducted, using a unique dynamic model of the BWE slewing superstructure that allows for the continuous
variation of the frequency of excitation. This has yielded the resonant-free domains, i.e. the domains where the structure is not exposed to the excessive dynamic impacts.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - Proceedings of the XXIV International Conference MHCL’22
T1  - Analysis of the impact of the frequency-controlled bucket wheel drive on the dynamic response of the excavator superstructure
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4999
ER  - 

@conference{
author = "Stefanović, Aleksandar Z. and Gnjatović, Nebojša and Milojević, Goran and Đenadić, Stevan and Urošević, Marko",
year = "2022",
abstract = "Bucket wheel excavators (BWEs) are the largest mobile terrestrial machines exposed to the working loads of a periodic character. This paper presents a small portion of the studies, conducted with the goal of proposing a new idea regarding preservation of the load-carrying
structures of these machines, based on the implementation of a controllable frequency-controlled drive of the excavating device. A detailed analysis of the dynamic response of the load-carrying structure is required in order to determine the domains of frequency of revolutions of the working device's driving motor where the dynamic response of the structure is favorable, and therefore successfully implement this idea. A methodologically-original study was conducted, using a unique dynamic model of the BWE slewing superstructure that allows for the continuous
variation of the frequency of excitation. This has yielded the resonant-free domains, i.e. the domains where the structure is not exposed to the excessive dynamic impacts.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "Proceedings of the XXIV International Conference MHCL’22",
title = "Analysis of the impact of the frequency-controlled bucket wheel drive on the dynamic response of the excavator superstructure",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4999"
}

Stefanović, A. Z., Gnjatović, N., Milojević, G., Đenadić, S.,& Urošević, M.. (2022). Analysis of the impact of the frequency-controlled bucket wheel drive on the dynamic response of the excavator superstructure. in Proceedings of the XXIV International Conference MHCL’22
University of Belgrade, Faculty of Mechanical Engineering..
https://hdl.handle.net/21.15107/rcub_machinery_4999

Stefanović AZ, Gnjatović N, Milojević G, Đenadić S, Urošević M. Analysis of the impact of the frequency-controlled bucket wheel drive on the dynamic response of the excavator superstructure. in Proceedings of the XXIV International Conference MHCL’22. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_4999 .

Stefanović, Aleksandar Z., Gnjatović, Nebojša, Milojević, Goran, Đenadić, Stevan, Urošević, Marko, "Analysis of the impact of the frequency-controlled bucket wheel drive on the dynamic response of the excavator superstructure" in Proceedings of the XXIV International Conference MHCL’22 (2022),
https://hdl.handle.net/21.15107/rcub_machinery_4999 .

TY  - CONF
AU  - Urošević, Marko
AU  - Zrnić, Nenad
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5003
AB  - Stackers are one of the vital parts of the system that work on the exploitation of coal in open-pit mines. During their exploitation life, they are exposed to hard working conditions in which dynamic and stochastic loads act on them. Therefore, the analysis of their dynamic behavior is necessary in order to prevent failures and ensure a longer working life. Given that the structure of the stackers is a dominantly spatial truss structure, the paper presents the procedure of forming a spatial reduced dynamic model of the stacker superstructure and analysis of the influence of the eccentricity of the discharge boom tension pulley created during the production process. The results are given through the displacements and accelerations of the referent points of the structure. The quantification of the eccentricity influence from the aspect of the dynamic behaviour of the machine is presented and discussed.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - Proceedings of the XXIV International Conference MHCL’22
T1  - The Impact of the Eccentricity of the Tension Pulley on the Dynamic Response of the Stacker Superstructure
EP  - 70
SP  - 61
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5003
ER  - 

@conference{
author = "Urošević, Marko and Zrnić, Nenad",
year = "2022",
abstract = "Stackers are one of the vital parts of the system that work on the exploitation of coal in open-pit mines. During their exploitation life, they are exposed to hard working conditions in which dynamic and stochastic loads act on them. Therefore, the analysis of their dynamic behavior is necessary in order to prevent failures and ensure a longer working life. Given that the structure of the stackers is a dominantly spatial truss structure, the paper presents the procedure of forming a spatial reduced dynamic model of the stacker superstructure and analysis of the influence of the eccentricity of the discharge boom tension pulley created during the production process. The results are given through the displacements and accelerations of the referent points of the structure. The quantification of the eccentricity influence from the aspect of the dynamic behaviour of the machine is presented and discussed.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "Proceedings of the XXIV International Conference MHCL’22",
title = "The Impact of the Eccentricity of the Tension Pulley on the Dynamic Response of the Stacker Superstructure",
pages = "70-61",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5003"
}

Urošević, M.,& Zrnić, N.. (2022). The Impact of the Eccentricity of the Tension Pulley on the Dynamic Response of the Stacker Superstructure. in Proceedings of the XXIV International Conference MHCL’22
University of Belgrade, Faculty of Mechanical Engineering., 61-70.
https://hdl.handle.net/21.15107/rcub_machinery_5003

Urošević M, Zrnić N. The Impact of the Eccentricity of the Tension Pulley on the Dynamic Response of the Stacker Superstructure. in Proceedings of the XXIV International Conference MHCL’22. 2022;:61-70.
https://hdl.handle.net/21.15107/rcub_machinery_5003 .

Urošević, Marko, Zrnić, Nenad, "The Impact of the Eccentricity of the Tension Pulley on the Dynamic Response of the Stacker Superstructure" in Proceedings of the XXIV International Conference MHCL’22 (2022):61-70,
https://hdl.handle.net/21.15107/rcub_machinery_5003 .

TY  - CONF
AU  - Zrnić, Nenad
AU  - Gašić, Vlada
AU  - Urošević, Marko
AU  - Arsić, Aleksandra
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4369
AB  - The paper deals with the mathematical modelling of the dynamic behavior of the structure of the ship unloader. It is given the procedure for formulation of the reduced dynamic model which retains the main aspects of the behavior of the structure and yet is simple enough to be performed with standard engineering tools. The approach is applied on the real bridge-type grab ship unloader but can also be used on similar complex structures. Initially, the complete structure is modelled with finite element software where the natural frequencies were obtained. This 3D model is reduced to an equivalent plane model of the sea-side part of the boom. The postulation of the analytical approach is based on the model of a simple beam with an overhang where dynamic analysis is concerned with the Rayleigh Ritz method for estimating the adopted admissible functions. The results of the modal analysis of the reduced mathematical model showed a small difference from the results of finite element analysis which stands for the verification of the presented approach.
PB  - Kraljevo : Faculty of Mechanical and Civil Engineering
C3  - Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021.
T1  - Finite Element and Analytical Modelling of Ship Unloader
EP  - A.18
SP  - A.13
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4369
ER  - 

@conference{
author = "Zrnić, Nenad and Gašić, Vlada and Urošević, Marko and Arsić, Aleksandra",
year = "2021",
abstract = "The paper deals with the mathematical modelling of the dynamic behavior of the structure of the ship unloader. It is given the procedure for formulation of the reduced dynamic model which retains the main aspects of the behavior of the structure and yet is simple enough to be performed with standard engineering tools. The approach is applied on the real bridge-type grab ship unloader but can also be used on similar complex structures. Initially, the complete structure is modelled with finite element software where the natural frequencies were obtained. This 3D model is reduced to an equivalent plane model of the sea-side part of the boom. The postulation of the analytical approach is based on the model of a simple beam with an overhang where dynamic analysis is concerned with the Rayleigh Ritz method for estimating the adopted admissible functions. The results of the modal analysis of the reduced mathematical model showed a small difference from the results of finite element analysis which stands for the verification of the presented approach.",
publisher = "Kraljevo : Faculty of Mechanical and Civil Engineering",
journal = "Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021.",
title = "Finite Element and Analytical Modelling of Ship Unloader",
pages = "A.18-A.13",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4369"
}

Zrnić, N., Gašić, V., Urošević, M.,& Arsić, A.. (2021). Finite Element and Analytical Modelling of Ship Unloader. in Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021.
Kraljevo : Faculty of Mechanical and Civil Engineering., A.13-A.18.
https://hdl.handle.net/21.15107/rcub_machinery_4369

Zrnić N, Gašić V, Urošević M, Arsić A. Finite Element and Analytical Modelling of Ship Unloader. in Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021.. 2021;:A.13-A.18.
https://hdl.handle.net/21.15107/rcub_machinery_4369 .

Zrnić, Nenad, Gašić, Vlada, Urošević, Marko, Arsić, Aleksandra, "Finite Element and Analytical Modelling of Ship Unloader" in Proceedings of X International Conference ”Heavy Machinery - HM 2021”, Vrnjačka Banja, 23-25. june 2021. (2021):A.13-A.18,
https://hdl.handle.net/21.15107/rcub_machinery_4369 .

TY  - CONF
AU  - Bošnjak, Srđan
AU  - Gnjatović, Nebojša
AU  - Milenović, Ivan Lj.
AU  - Stefanović, Aleksandar Z.
AU  - Urošević, Marko
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4936
AB  - A bucket wheel with drive represents a vital subsystem of any bucket wheel excavator. A multidecadal experience in the exploitation and maintenance of bucket wheel excavators SRs 2000 has imposed a need for modernization and unification of the excavating devices of four of such machines, used for the excavation of overburden in Serbian open pit mines. This paper presents a portion of the research dedicated to the problems of strength and dynamic properties of the bucket wheel boom, static stability of the superstructure as well as installation of the unified design solution for the bucket wheel drive of the bucket wheel excavator SRs 2000. By
installing a modernized design solution of the bucket wheel with drive, i.e. by the means of partial revitalization of the bucket wheel excavator, its exploitational life span is prolonged and, additionally, the level of reliability and availability of the overburden systems is increased, and a
significant reduction in maintenance expenses is achieved.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - Proceedings of the XXIII International Conference MHCL’19
T1  - Modernization and unification of the excavating devices of bucket wheel excavators SRs 2000 deployed in Serbian open pit mines
EP  - 182
SP  - 175
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4936
ER  - 

@conference{
author = "Bošnjak, Srđan and Gnjatović, Nebojša and Milenović, Ivan Lj. and Stefanović, Aleksandar Z. and Urošević, Marko",
year = "2019",
abstract = "A bucket wheel with drive represents a vital subsystem of any bucket wheel excavator. A multidecadal experience in the exploitation and maintenance of bucket wheel excavators SRs 2000 has imposed a need for modernization and unification of the excavating devices of four of such machines, used for the excavation of overburden in Serbian open pit mines. This paper presents a portion of the research dedicated to the problems of strength and dynamic properties of the bucket wheel boom, static stability of the superstructure as well as installation of the unified design solution for the bucket wheel drive of the bucket wheel excavator SRs 2000. By
installing a modernized design solution of the bucket wheel with drive, i.e. by the means of partial revitalization of the bucket wheel excavator, its exploitational life span is prolonged and, additionally, the level of reliability and availability of the overburden systems is increased, and a
significant reduction in maintenance expenses is achieved.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "Proceedings of the XXIII International Conference MHCL’19",
title = "Modernization and unification of the excavating devices of bucket wheel excavators SRs 2000 deployed in Serbian open pit mines",
pages = "182-175",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4936"
}

Bošnjak, S., Gnjatović, N., Milenović, I. Lj., Stefanović, A. Z.,& Urošević, M.. (2019). Modernization and unification of the excavating devices of bucket wheel excavators SRs 2000 deployed in Serbian open pit mines. in Proceedings of the XXIII International Conference MHCL’19
University of Belgrade, Faculty of Mechanical Engineering., 175-182.
https://hdl.handle.net/21.15107/rcub_machinery_4936

Bošnjak S, Gnjatović N, Milenović IL, Stefanović AZ, Urošević M. Modernization and unification of the excavating devices of bucket wheel excavators SRs 2000 deployed in Serbian open pit mines. in Proceedings of the XXIII International Conference MHCL’19. 2019;:175-182.
https://hdl.handle.net/21.15107/rcub_machinery_4936 .

Bošnjak, Srđan, Gnjatović, Nebojša, Milenović, Ivan Lj., Stefanović, Aleksandar Z., Urošević, Marko, "Modernization and unification of the excavating devices of bucket wheel excavators SRs 2000 deployed in Serbian open pit mines" in Proceedings of the XXIII International Conference MHCL’19 (2019):175-182,
https://hdl.handle.net/21.15107/rcub_machinery_4936 .

TY  - CONF
AU  - Zrnić, Nenad
AU  - Bojić, Sanja
AU  - Georgijević, Milošav
AU  - Urošević, Marko
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5449
AB  - This paper deals with problems and possible solutions for the
improvement of container transport of Serbia by using Danube as a
waterway. Given the geographical position in relation to the Danube,
Serbia has a sufficient number of ports on this river, which could be an
element of further development of the economy and therefore can be
considered as a great potential. An analysis of import and export of
container that was done in this paper indicates that Serbia has substantial
potential to transport containers on Danube. Consequently, there are
sufficient justifications for the design and construction of a modern
container terminal on the Danube which will connected Serbia with main
Europian ports and which will contribute to the further progress of the
Serbian economy.
PB  - SaTCIP
C3  - Proceedings of the Maritime and Port Logistics of the XXIII International Conference MHCL 2019
T1  - Analysis of the potential of Serbia to transport containers on Danube
EP  - 37
SP  - 32
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5449
ER  - 

@conference{
author = "Zrnić, Nenad and Bojić, Sanja and Georgijević, Milošav and Urošević, Marko",
year = "2019",
abstract = "This paper deals with problems and possible solutions for the
improvement of container transport of Serbia by using Danube as a
waterway. Given the geographical position in relation to the Danube,
Serbia has a sufficient number of ports on this river, which could be an
element of further development of the economy and therefore can be
considered as a great potential. An analysis of import and export of
container that was done in this paper indicates that Serbia has substantial
potential to transport containers on Danube. Consequently, there are
sufficient justifications for the design and construction of a modern
container terminal on the Danube which will connected Serbia with main
Europian ports and which will contribute to the further progress of the
Serbian economy.",
publisher = "SaTCIP",
journal = "Proceedings of the Maritime and Port Logistics of the XXIII International Conference MHCL 2019",
title = "Analysis of the potential of Serbia to transport containers on Danube",
pages = "37-32",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5449"
}

Zrnić, N., Bojić, S., Georgijević, M.,& Urošević, M.. (2019). Analysis of the potential of Serbia to transport containers on Danube. in Proceedings of the Maritime and Port Logistics of the XXIII International Conference MHCL 2019
SaTCIP., 32-37.
https://hdl.handle.net/21.15107/rcub_machinery_5449

Zrnić N, Bojić S, Georgijević M, Urošević M. Analysis of the potential of Serbia to transport containers on Danube. in Proceedings of the Maritime and Port Logistics of the XXIII International Conference MHCL 2019. 2019;:32-37.
https://hdl.handle.net/21.15107/rcub_machinery_5449 .

Zrnić, Nenad, Bojić, Sanja, Georgijević, Milošav, Urošević, Marko, "Analysis of the potential of Serbia to transport containers on Danube" in Proceedings of the Maritime and Port Logistics of the XXIII International Conference MHCL 2019 (2019):32-37,
https://hdl.handle.net/21.15107/rcub_machinery_5449 .

TY  - CONF
AU  - Zrnić, Nenad
AU  - Bojić, Sanja
AU  - Georgijević, Milošav
AU  - Urošević, Marko
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4998
AB  - This paper discusses the possibility the establish and construct a new container terminal in the Port of Novi Sad which has regional and international importance and good geographical position, located in the Serbian Autonomous Province of Vojvodina. The provided analysis presents current container flows in Serbia and the forecast for the next 5 and 10 years (including three scenarios: realistic, pessimistic and optimistic), at first for the whole country, but later on the analysis was focused on the Danube gravitating regions in Serbia and finally to the existing Port of Novi Sad in order to evaluate its potential to become a logistics center. It was concluded that the construction of a new container terminal in the Port of Novi Sad on the Danube aims to bring about a significant change in the container transport system in Serbia, but also in the region or the Danube countries.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - Proceedings of the XXIII International Conference MHCL’19
T1  - Analysis of the potential of the Port of Novi Sad to become a new container terminal on Danube
EP  - 298
SP  - 293
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4998
ER  - 

@conference{
author = "Zrnić, Nenad and Bojić, Sanja and Georgijević, Milošav and Urošević, Marko",
year = "2019",
abstract = "This paper discusses the possibility the establish and construct a new container terminal in the Port of Novi Sad which has regional and international importance and good geographical position, located in the Serbian Autonomous Province of Vojvodina. The provided analysis presents current container flows in Serbia and the forecast for the next 5 and 10 years (including three scenarios: realistic, pessimistic and optimistic), at first for the whole country, but later on the analysis was focused on the Danube gravitating regions in Serbia and finally to the existing Port of Novi Sad in order to evaluate its potential to become a logistics center. It was concluded that the construction of a new container terminal in the Port of Novi Sad on the Danube aims to bring about a significant change in the container transport system in Serbia, but also in the region or the Danube countries.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "Proceedings of the XXIII International Conference MHCL’19",
title = "Analysis of the potential of the Port of Novi Sad to become a new container terminal on Danube",
pages = "298-293",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4998"
}

Zrnić, N., Bojić, S., Georgijević, M.,& Urošević, M.. (2019). Analysis of the potential of the Port of Novi Sad to become a new container terminal on Danube. in Proceedings of the XXIII International Conference MHCL’19
University of Belgrade, Faculty of Mechanical Engineering., 293-298.
https://hdl.handle.net/21.15107/rcub_machinery_4998

Zrnić N, Bojić S, Georgijević M, Urošević M. Analysis of the potential of the Port of Novi Sad to become a new container terminal on Danube. in Proceedings of the XXIII International Conference MHCL’19. 2019;:293-298.
https://hdl.handle.net/21.15107/rcub_machinery_4998 .

Zrnić, Nenad, Bojić, Sanja, Georgijević, Milošav, Urošević, Marko, "Analysis of the potential of the Port of Novi Sad to become a new container terminal on Danube" in Proceedings of the XXIII International Conference MHCL’19 (2019):293-298,
https://hdl.handle.net/21.15107/rcub_machinery_4998 .