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  - Zrnić, Nenad
AU  - Popović, Tamara
AU  - Milojević, Goran
AU  - Kosanić, Nenad
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5438
AB  - This paper presents the research, development and application of Industry 4.0 in Intralogistics in the last five years.
The progress made in Intralogistics, using Industry 4.0, is presented. An overview of the basic principles and elements of
Industry 4.0 as well as its impact in the field of Intralogistics is given. Intralogistics is a field that is still being researched
and has great potential for further development. Finally, the aim of this paper is to focus on sustainability parameters,
technology and elements that still need to be worked on.
PB  - Faculty of Mechanical and Civil Engineering in Kraljevo
C3  - Proceedings of X International Conference “Heavy Machinery-HM 2021”
T1  - A Survey of Research on Industry 4.0 in Intralogistics
EP  - B.8
SP  - B.1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5438
ER  - 

@conference{
author = "Zrnić, Nenad and Popović, Tamara and Milojević, Goran and Kosanić, Nenad",
year = "2021",
abstract = "This paper presents the research, development and application of Industry 4.0 in Intralogistics in the last five years.
The progress made in Intralogistics, using Industry 4.0, is presented. An overview of the basic principles and elements of
Industry 4.0 as well as its impact in the field of Intralogistics is given. Intralogistics is a field that is still being researched
and has great potential for further development. Finally, the aim of this paper is to focus on sustainability parameters,
technology and elements that still need to be worked on.",
publisher = "Faculty of Mechanical and Civil Engineering in Kraljevo",
journal = "Proceedings of X International Conference “Heavy Machinery-HM 2021”",
title = "A Survey of Research on Industry 4.0 in Intralogistics",
pages = "B.8-B.1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5438"
}

Zrnić, N., Popović, T., Milojević, G.,& Kosanić, N.. (2021). A Survey of Research on Industry 4.0 in Intralogistics. in Proceedings of X International Conference “Heavy Machinery-HM 2021”
Faculty of Mechanical and Civil Engineering in Kraljevo., B.1-B.8.
https://hdl.handle.net/21.15107/rcub_machinery_5438

Zrnić N, Popović T, Milojević G, Kosanić N. A Survey of Research on Industry 4.0 in Intralogistics. in Proceedings of X International Conference “Heavy Machinery-HM 2021”. 2021;:B.1-B.8.
https://hdl.handle.net/21.15107/rcub_machinery_5438 .

Zrnić, Nenad, Popović, Tamara, Milojević, Goran, Kosanić, Nenad, "A Survey of Research on Industry 4.0 in Intralogistics" in Proceedings of X International Conference “Heavy Machinery-HM 2021” (2021):B.1-B.8,
https://hdl.handle.net/21.15107/rcub_machinery_5438 .

TY  - CONF
AU  - Đorđević, Miloš
AU  - Milojević, Goran
AU  - Vujičić, A.
AU  - Zrnić, Nenad
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4797
AB  - This paper deals with the LCA of a ball bearing used in belt conveyor idler.
Previous work had shown that ball bearing is manufacture intensive
product. Therefore herein conducted LCA is cradle-to-gate analysis and it
was focused on the production stage of the ball bearing. Chromium steel
and stainless steel were considered as ball bearing materials. Results had
shown that chromium steel from the ball bearing has the highest
environmental impact in all impact categories, followed by processes
related to machining of the chromium steel and forging. Change of the
lubricant harmed the environmental properties in this case. Future work
should consider different materials for raceways and balls.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - Proceedings of the 23rd International Conference on Material Handling Constructions and Logistics MHCL 2019
T1  - Life Cycle Assessment of The Belt Conveyor Idler Ball Bearing
EP  - 116
SP  - 111
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4797
ER  - 

@conference{
author = "Đorđević, Miloš and Milojević, Goran and Vujičić, A. and Zrnić, Nenad",
year = "2019",
abstract = "This paper deals with the LCA of a ball bearing used in belt conveyor idler.
Previous work had shown that ball bearing is manufacture intensive
product. Therefore herein conducted LCA is cradle-to-gate analysis and it
was focused on the production stage of the ball bearing. Chromium steel
and stainless steel were considered as ball bearing materials. Results had
shown that chromium steel from the ball bearing has the highest
environmental impact in all impact categories, followed by processes
related to machining of the chromium steel and forging. Change of the
lubricant harmed the environmental properties in this case. Future work
should consider different materials for raceways and balls.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "Proceedings of the 23rd International Conference on Material Handling Constructions and Logistics MHCL 2019",
title = "Life Cycle Assessment of The Belt Conveyor Idler Ball Bearing",
pages = "116-111",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4797"
}

Đorđević, M., Milojević, G., Vujičić, A.,& Zrnić, N.. (2019). Life Cycle Assessment of The Belt Conveyor Idler Ball Bearing. in Proceedings of the 23rd International Conference on Material Handling Constructions and Logistics MHCL 2019
University of Belgrade, Faculty of Mechanical Engineering., 111-116.
https://hdl.handle.net/21.15107/rcub_machinery_4797

Đorđević M, Milojević G, Vujičić A, Zrnić N. Life Cycle Assessment of The Belt Conveyor Idler Ball Bearing. in Proceedings of the 23rd International Conference on Material Handling Constructions and Logistics MHCL 2019. 2019;:111-116.
https://hdl.handle.net/21.15107/rcub_machinery_4797 .

Đorđević, Miloš, Milojević, Goran, Vujičić, A., Zrnić, Nenad, "Life Cycle Assessment of The Belt Conveyor Idler Ball Bearing" in Proceedings of the 23rd International Conference on Material Handling Constructions and Logistics MHCL 2019 (2019):111-116,
https://hdl.handle.net/21.15107/rcub_machinery_4797 .

TY  - JOUR
AU  - Kosanić, Nenad
AU  - Milojević, Goran
AU  - Zrnić, Nenad
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2816
AB  - Prethodna decenija donela je pravi procvat u oblasti automatskih skladišnih sistema (SBS/RS) baziranih na šatl tehnologiji u mnogim industrijama. Njihova superiornost u odnosu na 'mini-load' automatske skladišne sisteme ogleda se prvenstveno u mogućnosti većeg protoka skladišnih jedinica kroz sistem, velikoj fleksibilnosti proširenja sistema i mnogo boljoj energetskoj efikasnosti, koja je rezultat manje potrošnje energije i sposobnosti regeneracije velike količine energije. Sveobuhvatan pregled literature SBS/RS prikazan u ovom radu ukazuje na glavne specifičnosti, ključne pretpostavke i aproksimacije u razvijenim modelima za procenu vrednosti performansi sistema ili strategijama za upravljanje sistemom, i ističe najvažnije zaključke izvedene iz dobijenih rezultata. Predstavljeni pristupi u modeliranju sistema mogu biti koristan alat za projektante SBS/RS prilikom procene efikasnosti sistema u početnoj fazi projektovanja.
AB  - The last decade brought the blooming of the shuttle-based automated storage and retrieval system (SBS/RS) in many industrial applications. They proved the superiority over the mini-load automated storage and retrieval system mainly due to higher throughput capacity, high flexibility of future extension, much better energy efficiency resulting from lower energy consumption and high energy regeneration capability. A comprehensive literature review on SBS/RS given in the paper pointed out main specifics and crucial approximations and assumptions of the developed system performance estimation models or control strategies, as well as the main conclusions resulting from the obtained results. Presented modeling approaches could be a valuable tool for SBS/RS designers and other related decision makers to estimate the system efficiency in the starting phase of SBS/RS design activities.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Pregled literature iz oblasti skladišnih sistema baziranih na šatl tehnologiji
T1  - A survey of literature on shuttle based storage and retrieval systems
EP  - 409
IS  - 3
SP  - 400
VL  - 46
DO  - 10.5937/fmet1803400K
ER  - 

@article{
author = "Kosanić, Nenad and Milojević, Goran and Zrnić, Nenad",
year = "2018",
abstract = "Prethodna decenija donela je pravi procvat u oblasti automatskih skladišnih sistema (SBS/RS) baziranih na šatl tehnologiji u mnogim industrijama. Njihova superiornost u odnosu na 'mini-load' automatske skladišne sisteme ogleda se prvenstveno u mogućnosti većeg protoka skladišnih jedinica kroz sistem, velikoj fleksibilnosti proširenja sistema i mnogo boljoj energetskoj efikasnosti, koja je rezultat manje potrošnje energije i sposobnosti regeneracije velike količine energije. Sveobuhvatan pregled literature SBS/RS prikazan u ovom radu ukazuje na glavne specifičnosti, ključne pretpostavke i aproksimacije u razvijenim modelima za procenu vrednosti performansi sistema ili strategijama za upravljanje sistemom, i ističe najvažnije zaključke izvedene iz dobijenih rezultata. Predstavljeni pristupi u modeliranju sistema mogu biti koristan alat za projektante SBS/RS prilikom procene efikasnosti sistema u početnoj fazi projektovanja., The last decade brought the blooming of the shuttle-based automated storage and retrieval system (SBS/RS) in many industrial applications. They proved the superiority over the mini-load automated storage and retrieval system mainly due to higher throughput capacity, high flexibility of future extension, much better energy efficiency resulting from lower energy consumption and high energy regeneration capability. A comprehensive literature review on SBS/RS given in the paper pointed out main specifics and crucial approximations and assumptions of the developed system performance estimation models or control strategies, as well as the main conclusions resulting from the obtained results. Presented modeling approaches could be a valuable tool for SBS/RS designers and other related decision makers to estimate the system efficiency in the starting phase of SBS/RS design activities.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Pregled literature iz oblasti skladišnih sistema baziranih na šatl tehnologiji, A survey of literature on shuttle based storage and retrieval systems",
pages = "409-400",
number = "3",
volume = "46",
doi = "10.5937/fmet1803400K"
}

Kosanić, N., Milojević, G.,& Zrnić, N.. (2018). Pregled literature iz oblasti skladišnih sistema baziranih na šatl tehnologiji. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 46(3), 400-409.
https://doi.org/10.5937/fmet1803400K

Kosanić N, Milojević G, Zrnić N. Pregled literature iz oblasti skladišnih sistema baziranih na šatl tehnologiji. in FME Transactions. 2018;46(3):400-409.
doi:10.5937/fmet1803400K .

Kosanić, Nenad, Milojević, Goran, Zrnić, Nenad, "Pregled literature iz oblasti skladišnih sistema baziranih na šatl tehnologiji" in FME Transactions, 46, no. 3 (2018):400-409,
https://doi.org/10.5937/fmet1803400K . .

TY  - GEN
AU  - Bošnjak, Srđan
AU  - Gnjatović, Nebojša
AU  - Petković, Zoran D.
AU  - Milojević, Goran
AU  - Milenović, Ivan Lj.
AU  - Stefanović, Aleksandar Z.
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5045
AB  - Сопствена тежина подсистема стреле ротора доминантно утиче на интензитет силе у ужету механизма за промену угла нагиба стреле ротора [1]. Осим тога, положај тежишта обртне горње градње значајно утиче на дистрибуцију оптерећења унутар радиаксијалног лежаја којим се обртна горња градња ослања на доњу градњу, а тиме и на његов век [4,5]. На основу изложених чињеница закључује се да прецизна идентификација основних параметара статичке стабилности (ОПСС: тежина и положај тежишта) омогућава: (1) поуздано подешавање граничних вредности сила у ужадима механизма за промену угла нагиба стреле ротора, које представљају основну заштиту од губитка статичке стабилности обртне горње градње; (2) идентификацију оптерећења кука‐хватаљки, које спречавају губитак статичке стабилности у екстремним случајевима оптерећења; (3) одређивање неравномерности оптерећења котрљајних тела радиаксијалног лежаја за ослањање обртне горње градње.
Основне експлоатационе карактеристике, поузданост и безбедност роторних багера доминантно одређују параметри горње градње. Они се могу сврстати у три основне групе: (1) параметри који одређују статичку стабилност горње градње; (2) параметри који одређују чврстоћу горње градње; (3) параметри који одређују динамичко понашање горње градње. Заједнички именитељ свих наведених параметара јесте маса горње градње односно, њена дистрибуција по структури. Зато се одређивању ОПСС, мора посветити посебна пажња у свим фазама пројектовања роторног багера. Чак и код светски реномираних произвођача роторних багера јављају се знатне разлике поменутих параметара горње градње током развоја пројекта, што је најчешће последица накнадних захтева купца, или немогућности набавке пројектом предвиђених компоненти. Управо због тога, након завршетка монтаже машине обавезно се врши експериментално одређивање тежине горње градње и положаја њеног тежишта [7‐10] са циљем да се изврши валидација пројектованих ОПСС [11,12]. Према цитираној литератури, поступак валидације изводи се упоређивањем пројектоване и измерене тежине горње градње. Уколико је разлика измерене и пројектоване тежине већа од 5%, онда се захтева понављање и прорачуна и вагања. О упоређивању положаја тежишта, одређеног аналитички и експериментом, у цитираној литератури нема ни помена. С обзиром на чињеницу да се у литератури [2‐12], као ни у [13‐16], дакле у целокупној литератури и техничкој регулативи која је била доступна ауторима, нигде не наводи могућност спрезања резултата добијених аналитички и експериментом, техничким решењем постављен је оригинални метод формирања аналитичког модела обртне горње градње потпуно усаглашеног са изведеним стањем утврђеним експериментом.
Суштину техничког решења и његову примену код роторног багера SchRs 1600 аутори су
публиковали у часопису Journal of Zhejiang University ‐ SCIENCE A (категорија М22) као рад под називом „Basic parameters of the static stability, loads and strength of the vital parts of the bucket wheel excavator’s slewing superstructure“ (https://doi.org/10.1631/jzus.A1500037), Прилог 3. Поменути рад представља први рад из области идентификације и оцене основних параметара статичке стабилности роторних багера објављен у часопису са SCI листе, што сведочи о научном потенцијалу техничког решења.
PB  - University of Belgrade, Faculty of Mechanical Engineering
T2  - ТЕХНИЧКО РЕШЕЊЕ (КАТЕГОРИЈА М83)
T1  - Примена 3Д модела за аналитичко‐експериментално одређивање параметара статичке стабилности и спољашњег оптерећења роторног багера
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5045
ER  - 

@misc{
author = "Bošnjak, Srđan and Gnjatović, Nebojša and Petković, Zoran D. and Milojević, Goran and Milenović, Ivan Lj. and Stefanović, Aleksandar Z.",
year = "2017",
abstract = "Сопствена тежина подсистема стреле ротора доминантно утиче на интензитет силе у ужету механизма за промену угла нагиба стреле ротора [1]. Осим тога, положај тежишта обртне горње градње значајно утиче на дистрибуцију оптерећења унутар радиаксијалног лежаја којим се обртна горња градња ослања на доњу градњу, а тиме и на његов век [4,5]. На основу изложених чињеница закључује се да прецизна идентификација основних параметара статичке стабилности (ОПСС: тежина и положај тежишта) омогућава: (1) поуздано подешавање граничних вредности сила у ужадима механизма за промену угла нагиба стреле ротора, које представљају основну заштиту од губитка статичке стабилности обртне горње градње; (2) идентификацију оптерећења кука‐хватаљки, које спречавају губитак статичке стабилности у екстремним случајевима оптерећења; (3) одређивање неравномерности оптерећења котрљајних тела радиаксијалног лежаја за ослањање обртне горње градње.
Основне експлоатационе карактеристике, поузданост и безбедност роторних багера доминантно одређују параметри горње градње. Они се могу сврстати у три основне групе: (1) параметри који одређују статичку стабилност горње градње; (2) параметри који одређују чврстоћу горње градње; (3) параметри који одређују динамичко понашање горње градње. Заједнички именитељ свих наведених параметара јесте маса горње градње односно, њена дистрибуција по структури. Зато се одређивању ОПСС, мора посветити посебна пажња у свим фазама пројектовања роторног багера. Чак и код светски реномираних произвођача роторних багера јављају се знатне разлике поменутих параметара горње градње током развоја пројекта, што је најчешће последица накнадних захтева купца, или немогућности набавке пројектом предвиђених компоненти. Управо због тога, након завршетка монтаже машине обавезно се врши експериментално одређивање тежине горње градње и положаја њеног тежишта [7‐10] са циљем да се изврши валидација пројектованих ОПСС [11,12]. Према цитираној литератури, поступак валидације изводи се упоређивањем пројектоване и измерене тежине горње градње. Уколико је разлика измерене и пројектоване тежине већа од 5%, онда се захтева понављање и прорачуна и вагања. О упоређивању положаја тежишта, одређеног аналитички и експериментом, у цитираној литератури нема ни помена. С обзиром на чињеницу да се у литератури [2‐12], као ни у [13‐16], дакле у целокупној литератури и техничкој регулативи која је била доступна ауторима, нигде не наводи могућност спрезања резултата добијених аналитички и експериментом, техничким решењем постављен је оригинални метод формирања аналитичког модела обртне горње градње потпуно усаглашеног са изведеним стањем утврђеним експериментом.
Суштину техничког решења и његову примену код роторног багера SchRs 1600 аутори су
публиковали у часопису Journal of Zhejiang University ‐ SCIENCE A (категорија М22) као рад под називом „Basic parameters of the static stability, loads and strength of the vital parts of the bucket wheel excavator’s slewing superstructure“ (https://doi.org/10.1631/jzus.A1500037), Прилог 3. Поменути рад представља први рад из области идентификације и оцене основних параметара статичке стабилности роторних багера објављен у часопису са SCI листе, што сведочи о научном потенцијалу техничког решења.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "ТЕХНИЧКО РЕШЕЊЕ (КАТЕГОРИЈА М83)",
title = "Примена 3Д модела за аналитичко‐експериментално одређивање параметара статичке стабилности и спољашњег оптерећења роторног багера",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5045"
}

Bošnjak, S., Gnjatović, N., Petković, Z. D., Milojević, G., Milenović, I. Lj.,& Stefanović, A. Z.. (2017). Примена 3Д модела за аналитичко‐експериментално одређивање параметара статичке стабилности и спољашњег оптерећења роторног багера. in ТЕХНИЧКО РЕШЕЊЕ (КАТЕГОРИЈА М83)
University of Belgrade, Faculty of Mechanical Engineering..
https://hdl.handle.net/21.15107/rcub_machinery_5045

Bošnjak S, Gnjatović N, Petković ZD, Milojević G, Milenović IL, Stefanović AZ. Примена 3Д модела за аналитичко‐експериментално одређивање параметара статичке стабилности и спољашњег оптерећења роторног багера. in ТЕХНИЧКО РЕШЕЊЕ (КАТЕГОРИЈА М83). 2017;.
https://hdl.handle.net/21.15107/rcub_machinery_5045 .

Bošnjak, Srđan, Gnjatović, Nebojša, Petković, Zoran D., Milojević, Goran, Milenović, Ivan Lj., Stefanović, Aleksandar Z., "Примена 3Д модела за аналитичко‐експериментално одређивање параметара статичке стабилности и спољашњег оптерећења роторног багера" in ТЕХНИЧКО РЕШЕЊЕ (КАТЕГОРИЈА М83) (2017),
https://hdl.handle.net/21.15107/rcub_machinery_5045 .

TY  - JOUR
AU  - Bošnjak, Srđan
AU  - Arsić, Miodrag
AU  - Savićević, Sreten
AU  - Milojević, Goran
AU  - Arsić, Dušan
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2433
AB  - This paper presents the results of the pulley fracture analysis. Experimental investigations confirmed that the chemical composition and basic mechanical properties of the pulley material, except the impact energy at a temperature of - 20 degrees C, meet the requirements of the corresponding standard. The impact energy value at the temperature of - 20 degrees C is for approximate to 45% lower than the prescribed value which has considerable influence on the appearance of the brittle fracture, especially having in mind the fact that the bucket wheel excavators operate at low temperatures. Metallographic examinations as well as magnetic particle inspections indicated that initial cracks in the welded joints occurred during the manufacture of the pulleys. Characteristic levels of the rope load cycle are obtained by using in-house software which includes the dynamic effects of the resistance-to-excavation. The FEA results pointed out that in the representative load cases the combinations of the mean stress and the alternating stress in the pulley critical zone lie considerably below the limit line of the modified Goodman's diagram. The conclusion, based on the presented results, is that the fracture of the pulley appeared as the result of the 'manufacturing-in' defects.
PB  - Polish Maintenance Soc, Lublin
T2  - Eksploatacja I Niezawodnosc-Maintenance and Reliability
T1  - Fracture analysis of the pulley of a bucket wheel boom hoist system
EP  - 163
IS  - 2
SP  - 155
VL  - 18
DO  - 10.17531/ein.2016.2.1
ER  - 

@article{
author = "Bošnjak, Srđan and Arsić, Miodrag and Savićević, Sreten and Milojević, Goran and Arsić, Dušan",
year = "2016",
abstract = "This paper presents the results of the pulley fracture analysis. Experimental investigations confirmed that the chemical composition and basic mechanical properties of the pulley material, except the impact energy at a temperature of - 20 degrees C, meet the requirements of the corresponding standard. The impact energy value at the temperature of - 20 degrees C is for approximate to 45% lower than the prescribed value which has considerable influence on the appearance of the brittle fracture, especially having in mind the fact that the bucket wheel excavators operate at low temperatures. Metallographic examinations as well as magnetic particle inspections indicated that initial cracks in the welded joints occurred during the manufacture of the pulleys. Characteristic levels of the rope load cycle are obtained by using in-house software which includes the dynamic effects of the resistance-to-excavation. The FEA results pointed out that in the representative load cases the combinations of the mean stress and the alternating stress in the pulley critical zone lie considerably below the limit line of the modified Goodman's diagram. The conclusion, based on the presented results, is that the fracture of the pulley appeared as the result of the 'manufacturing-in' defects.",
publisher = "Polish Maintenance Soc, Lublin",
journal = "Eksploatacja I Niezawodnosc-Maintenance and Reliability",
title = "Fracture analysis of the pulley of a bucket wheel boom hoist system",
pages = "163-155",
number = "2",
volume = "18",
doi = "10.17531/ein.2016.2.1"
}

Bošnjak, S., Arsić, M., Savićević, S., Milojević, G.,& Arsić, D.. (2016). Fracture analysis of the pulley of a bucket wheel boom hoist system. in Eksploatacja I Niezawodnosc-Maintenance and Reliability
Polish Maintenance Soc, Lublin., 18(2), 155-163.
https://doi.org/10.17531/ein.2016.2.1

Bošnjak S, Arsić M, Savićević S, Milojević G, Arsić D. Fracture analysis of the pulley of a bucket wheel boom hoist system. in Eksploatacja I Niezawodnosc-Maintenance and Reliability. 2016;18(2):155-163.
doi:10.17531/ein.2016.2.1 .

Bošnjak, Srđan, Arsić, Miodrag, Savićević, Sreten, Milojević, Goran, Arsić, Dušan, "Fracture analysis of the pulley of a bucket wheel boom hoist system" in Eksploatacja I Niezawodnosc-Maintenance and Reliability, 18, no. 2 (2016):155-163,
https://doi.org/10.17531/ein.2016.2.1 . .

TY  - CONF
AU  - Petković, Zoran D.
AU  - Gnjatović, Nebojša
AU  - Milenović, Ivan Lj.
AU  - Milojević, Goran
AU  - Stefanović, Aleksandar Z.
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4922
AB  - Mounting and dismantling of large-scale mechanical systems is a complex engineering challenge due to several factors, such as structural diversity and size of handled structures, limited 
maneuvering options, and absence of related literature, to name the few, all of which make each problem unique. Numerous disasters throughout the history created a need for a safe approach to the problem of executing such procedures risk-free, while preserving the structural integrity and functionality of the structures. One of the most reliable methods is the application of unique below-the hook lifting devices and the goal of this paper is to present the benefits of their use via two examples. Case 1 deals with dismounting of dated constructions in a densely populated area, with limited structural data provided. Case 2 is focused on mounting of a large-scale roof structure in harsh boundary conditions, with limited maneuvering space. Results presented in this paper represent a contribution to the field of below-the hook lifting devices.
PB  - SaTCIP
C3  - Proceedings of the XXI International Conference MHCL’15
T1  - Specific Engineering Challenges During the Large-Scale Structures’ Mantling and Dismantling Procedures
EP  - 240
SP  - 235
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4922
ER  - 

@conference{
author = "Petković, Zoran D. and Gnjatović, Nebojša and Milenović, Ivan Lj. and Milojević, Goran and Stefanović, Aleksandar Z.",
year = "2015",
abstract = "Mounting and dismantling of large-scale mechanical systems is a complex engineering challenge due to several factors, such as structural diversity and size of handled structures, limited 
maneuvering options, and absence of related literature, to name the few, all of which make each problem unique. Numerous disasters throughout the history created a need for a safe approach to the problem of executing such procedures risk-free, while preserving the structural integrity and functionality of the structures. One of the most reliable methods is the application of unique below-the hook lifting devices and the goal of this paper is to present the benefits of their use via two examples. Case 1 deals with dismounting of dated constructions in a densely populated area, with limited structural data provided. Case 2 is focused on mounting of a large-scale roof structure in harsh boundary conditions, with limited maneuvering space. Results presented in this paper represent a contribution to the field of below-the hook lifting devices.",
publisher = "SaTCIP",
journal = "Proceedings of the XXI International Conference MHCL’15",
title = "Specific Engineering Challenges During the Large-Scale Structures’ Mantling and Dismantling Procedures",
pages = "240-235",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4922"
}

Petković, Z. D., Gnjatović, N., Milenović, I. Lj., Milojević, G.,& Stefanović, A. Z.. (2015). Specific Engineering Challenges During the Large-Scale Structures’ Mantling and Dismantling Procedures. in Proceedings of the XXI International Conference MHCL’15
SaTCIP., 235-240.
https://hdl.handle.net/21.15107/rcub_machinery_4922

Petković ZD, Gnjatović N, Milenović IL, Milojević G, Stefanović AZ. Specific Engineering Challenges During the Large-Scale Structures’ Mantling and Dismantling Procedures. in Proceedings of the XXI International Conference MHCL’15. 2015;:235-240.
https://hdl.handle.net/21.15107/rcub_machinery_4922 .

Petković, Zoran D., Gnjatović, Nebojša, Milenović, Ivan Lj., Milojević, Goran, Stefanović, Aleksandar Z., "Specific Engineering Challenges During the Large-Scale Structures’ Mantling and Dismantling Procedures" in Proceedings of the XXI International Conference MHCL’15 (2015):235-240,
https://hdl.handle.net/21.15107/rcub_machinery_4922 .

TY  - CONF
AU  - Gašić, Vlada
AU  - Zrnić, Nenad
AU  - Milojević, Goran
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4518
AB  - The capacity curves for specified I-section beams are determined in this
work, in order to represent guidance for designers of material handling
equipment. Safety requirements for beams are implemented in given
algorithm. Specially, the beam model of monorail crane concerns the
stress, deflection and lateral buckling proof as main considerations in
design of such systems. There are given capacity curves for various I-sections
with respect to desired span of runway which enables fast and
easy adoption of structural elements. Also, they can be used for capacity
estimation of the single girder bridge cranes and other beamlike
structures.
PB  - University of Belgrade: Faculty of Mechanical Engineering
C3  - Proceedings of XXI International Conference on "Material Handling, Constructions and Logistics" - MHCL 2015
T1  - Loading Capacity Curves for Design of I-Section Runway Beams
EP  - 116
SP  - 113
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4518
ER  - 

@conference{
author = "Gašić, Vlada and Zrnić, Nenad and Milojević, Goran",
year = "2015",
abstract = "The capacity curves for specified I-section beams are determined in this
work, in order to represent guidance for designers of material handling
equipment. Safety requirements for beams are implemented in given
algorithm. Specially, the beam model of monorail crane concerns the
stress, deflection and lateral buckling proof as main considerations in
design of such systems. There are given capacity curves for various I-sections
with respect to desired span of runway which enables fast and
easy adoption of structural elements. Also, they can be used for capacity
estimation of the single girder bridge cranes and other beamlike
structures.",
publisher = "University of Belgrade: Faculty of Mechanical Engineering",
journal = "Proceedings of XXI International Conference on "Material Handling, Constructions and Logistics" - MHCL 2015",
title = "Loading Capacity Curves for Design of I-Section Runway Beams",
pages = "116-113",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4518"
}

Gašić, V., Zrnić, N.,& Milojević, G.. (2015). Loading Capacity Curves for Design of I-Section Runway Beams. in Proceedings of XXI International Conference on "Material Handling, Constructions and Logistics" - MHCL 2015
University of Belgrade: Faculty of Mechanical Engineering., 113-116.
https://hdl.handle.net/21.15107/rcub_machinery_4518

Gašić V, Zrnić N, Milojević G. Loading Capacity Curves for Design of I-Section Runway Beams. in Proceedings of XXI International Conference on "Material Handling, Constructions and Logistics" - MHCL 2015. 2015;:113-116.
https://hdl.handle.net/21.15107/rcub_machinery_4518 .

Gašić, Vlada, Zrnić, Nenad, Milojević, Goran, "Loading Capacity Curves for Design of I-Section Runway Beams" in Proceedings of XXI International Conference on "Material Handling, Constructions and Logistics" - MHCL 2015 (2015):113-116,
https://hdl.handle.net/21.15107/rcub_machinery_4518 .

TY  - CONF
AU  - Petković, Zoran D.
AU  - Gnjatović, Nebojša
AU  - Milenović, Ivan Lj.
AU  - Milojević, Goran
AU  - Stefanović, Aleksandar Z.
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4916
AB  - Mounting of large-scale mechanical systems involves lifting and positioning of the so-called specific loads, namely structures of great dimensions and masses whose functionality and structural integrity should not be jeopardized during the realization of the erection procedures. Two examples of spatial truss roof construction mountings are presented in this paper as case 1, underlying the effect of unique lifting device usage on uniform load distribution on the structures being lifted. Case 2 deals with mounting of three tall vertical pressure vessels of different weights and heights with the same lifting gear and traverse specially designed to accomplish the aforementioned tasks. Case 3 is focused on the redesign of the existing traverse in order to fulfill the task of lifting and precise positioning of the bucket wheel excavator segment, a truss structure of a great span, weighing 90 t. Results presented in this paper represent a contribution in the field of below-the-hook lifting devices design, arising from the specificity of engineering problems dealing with mounting of large-scale structures.
PB  - SaTCIP
C3  - 14th International Conference "Research and Development in Mechanical Industry" RaDMI 2014
T1  - Design of unique below-the-hook lifting devices for specific loads
EP  - 51
SP  - 44
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4916
ER  - 

@conference{
author = "Petković, Zoran D. and Gnjatović, Nebojša and Milenović, Ivan Lj. and Milojević, Goran and Stefanović, Aleksandar Z.",
year = "2014",
abstract = "Mounting of large-scale mechanical systems involves lifting and positioning of the so-called specific loads, namely structures of great dimensions and masses whose functionality and structural integrity should not be jeopardized during the realization of the erection procedures. Two examples of spatial truss roof construction mountings are presented in this paper as case 1, underlying the effect of unique lifting device usage on uniform load distribution on the structures being lifted. Case 2 deals with mounting of three tall vertical pressure vessels of different weights and heights with the same lifting gear and traverse specially designed to accomplish the aforementioned tasks. Case 3 is focused on the redesign of the existing traverse in order to fulfill the task of lifting and precise positioning of the bucket wheel excavator segment, a truss structure of a great span, weighing 90 t. Results presented in this paper represent a contribution in the field of below-the-hook lifting devices design, arising from the specificity of engineering problems dealing with mounting of large-scale structures.",
publisher = "SaTCIP",
journal = "14th International Conference "Research and Development in Mechanical Industry" RaDMI 2014",
title = "Design of unique below-the-hook lifting devices for specific loads",
pages = "51-44",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4916"
}

Petković, Z. D., Gnjatović, N., Milenović, I. Lj., Milojević, G.,& Stefanović, A. Z.. (2014). Design of unique below-the-hook lifting devices for specific loads. in 14th International Conference "Research and Development in Mechanical Industry" RaDMI 2014
SaTCIP., 44-51.
https://hdl.handle.net/21.15107/rcub_machinery_4916

Petković ZD, Gnjatović N, Milenović IL, Milojević G, Stefanović AZ. Design of unique below-the-hook lifting devices for specific loads. in 14th International Conference "Research and Development in Mechanical Industry" RaDMI 2014. 2014;:44-51.
https://hdl.handle.net/21.15107/rcub_machinery_4916 .

Petković, Zoran D., Gnjatović, Nebojša, Milenović, Ivan Lj., Milojević, Goran, Stefanović, Aleksandar Z., "Design of unique below-the-hook lifting devices for specific loads" in 14th International Conference "Research and Development in Mechanical Industry" RaDMI 2014 (2014):44-51,
https://hdl.handle.net/21.15107/rcub_machinery_4916 .

TY  - CONF
AU  - Gnjatović, Nebojša
AU  - Milojević, Goran
AU  - Milenović, Ivan Lj.
AU  - Stefanović, Aleksandar Z.
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4914
AB  - This paper describes the failure analysis results of undercarriage and superstructure vital 
subassemblies, which led to periodical stoppage and eventually total collapse of the bucket wheel excavator (BWE) SchRs 1760, once the machine with the highest theoretical capacity operating on the overburden excavation in open pit mine “Kolubara” - Serbia. It is conclusive that the main cause of two wheel bogie structural failure, described as case 1, is its insufficient strength during the action of lateral forces which are dominantly applied during the BWE curve travel. Case 2 analyses the support structure of portal tie-rods failure which was the consequence of superposition of the negative effects caused by inadequate shaping and dimensioning of the support assembly for given load conditions, as well as influences of defects of the metal weld structure. Both of the described failures are caused by the design-in faults.
PB  - SaTCIP
C3  - Proceedings of the The Eighth Triennial International Conference Heavy Machinery - HM 2014
T1  - ‘Design-in’ Faults - the Reason for Serious Drawbacks in High Capacity Bucket Wheel Excavator Exploitation
EP  - A.182
SP  - A.177
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4914
ER  - 

@conference{
author = "Gnjatović, Nebojša and Milojević, Goran and Milenović, Ivan Lj. and Stefanović, Aleksandar Z.",
year = "2014",
abstract = "This paper describes the failure analysis results of undercarriage and superstructure vital 
subassemblies, which led to periodical stoppage and eventually total collapse of the bucket wheel excavator (BWE) SchRs 1760, once the machine with the highest theoretical capacity operating on the overburden excavation in open pit mine “Kolubara” - Serbia. It is conclusive that the main cause of two wheel bogie structural failure, described as case 1, is its insufficient strength during the action of lateral forces which are dominantly applied during the BWE curve travel. Case 2 analyses the support structure of portal tie-rods failure which was the consequence of superposition of the negative effects caused by inadequate shaping and dimensioning of the support assembly for given load conditions, as well as influences of defects of the metal weld structure. Both of the described failures are caused by the design-in faults.",
publisher = "SaTCIP",
journal = "Proceedings of the The Eighth Triennial International Conference Heavy Machinery - HM 2014",
title = "‘Design-in’ Faults - the Reason for Serious Drawbacks in High Capacity Bucket Wheel Excavator Exploitation",
pages = "A.182-A.177",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4914"
}

Gnjatović, N., Milojević, G., Milenović, I. Lj.,& Stefanović, A. Z.. (2014). ‘Design-in’ Faults - the Reason for Serious Drawbacks in High Capacity Bucket Wheel Excavator Exploitation. in Proceedings of the The Eighth Triennial International Conference Heavy Machinery - HM 2014
SaTCIP., A.177-A.182.
https://hdl.handle.net/21.15107/rcub_machinery_4914

Gnjatović N, Milojević G, Milenović IL, Stefanović AZ. ‘Design-in’ Faults - the Reason for Serious Drawbacks in High Capacity Bucket Wheel Excavator Exploitation. in Proceedings of the The Eighth Triennial International Conference Heavy Machinery - HM 2014. 2014;:A.177-A.182.
https://hdl.handle.net/21.15107/rcub_machinery_4914 .

Gnjatović, Nebojša, Milojević, Goran, Milenović, Ivan Lj., Stefanović, Aleksandar Z., "‘Design-in’ Faults - the Reason for Serious Drawbacks in High Capacity Bucket Wheel Excavator Exploitation" in Proceedings of the The Eighth Triennial International Conference Heavy Machinery - HM 2014 (2014):A.177-A.182,
https://hdl.handle.net/21.15107/rcub_machinery_4914 .

TY  - CONF
AU  - Bošnjak, Srđan
AU  - Petković, Zoran D.
AU  - Gnjatović, Nebojša
AU  - Mihajlović, Vaso M.
AU  - Milojević, Goran
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4912
AB  - The extremely heavy duty conditions of the Surface Mining Machines (SMM) provide fertile ground for the occurrence of the various types of failures in their travelling mechanisms and belonging substructures. Although failures of the SMM travelling mechanisms occur infrequently, they may lead to very serious or even disastrous consequences. Even in cases when consequences are not catastrophic they cause direct costs, as well as indirect costs due to the downtime that substantially diminishes the effects of SMM exploitation. Furthermore, replacement of damaged parts is executed on site, often in hard working conditions that essentially prolong the downtime of the complete surface mining system. This paper discusses the causes of the failures in the vital parts of the crawler travel gear of the bucket wheel excavators and spreaders: chain links, track wheels, two-wheel bogies and undercarriage. Based on the results of the analytical–numerical–experimental analyses, it was concluded
that: (a) chain links' failures are caused by 'manufacturing-in' defects; (b) track wheels'
failures are caused by 'design-in' and ' manufacturing-in' defects; (c) failures of the twowheel bogies and undercarriage are caused by 'design-in' defects. Besides that, the redesigned structures of the two-wheel bogies and undercarriage are presented. The validity of the presented reconstruction designs are unquestionably confirmed by their failure less exploitation after the reconstruction. Finally, the obtained results are important because the same problems could arise in the crawler travelling mechanisms of wide class of earthmoving and material handling machines.
PB  - Banja Luka : Faculty of Mechanical Engineering
C3  - Proceedings of the 11th International conference on accomplishments in Electrical and Mechanical Engineering and Information Technology
T1  - Strength problems of the travelling mechanisms of the open pit machines
EP  - 254
SP  - 249
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4912
ER  - 

@conference{
author = "Bošnjak, Srđan and Petković, Zoran D. and Gnjatović, Nebojša and Mihajlović, Vaso M. and Milojević, Goran",
year = "2013",
abstract = "The extremely heavy duty conditions of the Surface Mining Machines (SMM) provide fertile ground for the occurrence of the various types of failures in their travelling mechanisms and belonging substructures. Although failures of the SMM travelling mechanisms occur infrequently, they may lead to very serious or even disastrous consequences. Even in cases when consequences are not catastrophic they cause direct costs, as well as indirect costs due to the downtime that substantially diminishes the effects of SMM exploitation. Furthermore, replacement of damaged parts is executed on site, often in hard working conditions that essentially prolong the downtime of the complete surface mining system. This paper discusses the causes of the failures in the vital parts of the crawler travel gear of the bucket wheel excavators and spreaders: chain links, track wheels, two-wheel bogies and undercarriage. Based on the results of the analytical–numerical–experimental analyses, it was concluded
that: (a) chain links' failures are caused by 'manufacturing-in' defects; (b) track wheels'
failures are caused by 'design-in' and ' manufacturing-in' defects; (c) failures of the twowheel bogies and undercarriage are caused by 'design-in' defects. Besides that, the redesigned structures of the two-wheel bogies and undercarriage are presented. The validity of the presented reconstruction designs are unquestionably confirmed by their failure less exploitation after the reconstruction. Finally, the obtained results are important because the same problems could arise in the crawler travelling mechanisms of wide class of earthmoving and material handling machines.",
publisher = "Banja Luka : Faculty of Mechanical Engineering",
journal = "Proceedings of the 11th International conference on accomplishments in Electrical and Mechanical Engineering and Information Technology",
title = "Strength problems of the travelling mechanisms of the open pit machines",
pages = "254-249",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4912"
}

Bošnjak, S., Petković, Z. D., Gnjatović, N., Mihajlović, V. M.,& Milojević, G.. (2013). Strength problems of the travelling mechanisms of the open pit machines. in Proceedings of the 11th International conference on accomplishments in Electrical and Mechanical Engineering and Information Technology
Banja Luka : Faculty of Mechanical Engineering., 249-254.
https://hdl.handle.net/21.15107/rcub_machinery_4912

Bošnjak S, Petković ZD, Gnjatović N, Mihajlović VM, Milojević G. Strength problems of the travelling mechanisms of the open pit machines. in Proceedings of the 11th International conference on accomplishments in Electrical and Mechanical Engineering and Information Technology. 2013;:249-254.
https://hdl.handle.net/21.15107/rcub_machinery_4912 .

Bošnjak, Srđan, Petković, Zoran D., Gnjatović, Nebojša, Mihajlović, Vaso M., Milojević, Goran, "Strength problems of the travelling mechanisms of the open pit machines" in Proceedings of the 11th International conference on accomplishments in Electrical and Mechanical Engineering and Information Technology (2013):249-254,
https://hdl.handle.net/21.15107/rcub_machinery_4912 .

TY  - CONF
AU  - Bošnjak, Srđan
AU  - Petković, Zoran D.
AU  - Gnjatović, Nebojša
AU  - Milenović, Ivan Lj.
AU  - Milojević, Goran
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4908
AB  - This paper presents the results of the study dedicated to the problem of the bucket wheel excavator equalizing system (ES) strength. Finite element analysis of two wheel (TWB), four wheel (FWB) and eight wheel (EWB) bogies were conducted in order to determine weak points in ES structure. Strength and carrying capacity of FWB and EWB structures might be jeopardized due to their insufficient strength under lateral forces acting during curve travel. Severe failure of similar TWB structure is also presented and certain paraleles were made.
PB  - SaTCIP
C3  - 13th International Conference "Research and Development in Mechanical Industry" RaDMI 2013
T1  - Strength analysis of bucket wheel excavator’s eight wheel equalizing system
EP  - 10
SP  - 1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4908
ER  - 

@conference{
author = "Bošnjak, Srđan and Petković, Zoran D. and Gnjatović, Nebojša and Milenović, Ivan Lj. and Milojević, Goran",
year = "2013",
abstract = "This paper presents the results of the study dedicated to the problem of the bucket wheel excavator equalizing system (ES) strength. Finite element analysis of two wheel (TWB), four wheel (FWB) and eight wheel (EWB) bogies were conducted in order to determine weak points in ES structure. Strength and carrying capacity of FWB and EWB structures might be jeopardized due to their insufficient strength under lateral forces acting during curve travel. Severe failure of similar TWB structure is also presented and certain paraleles were made.",
publisher = "SaTCIP",
journal = "13th International Conference "Research and Development in Mechanical Industry" RaDMI 2013",
title = "Strength analysis of bucket wheel excavator’s eight wheel equalizing system",
pages = "10-1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4908"
}

Bošnjak, S., Petković, Z. D., Gnjatović, N., Milenović, I. Lj.,& Milojević, G.. (2013). Strength analysis of bucket wheel excavator’s eight wheel equalizing system. in 13th International Conference "Research and Development in Mechanical Industry" RaDMI 2013
SaTCIP., 1-10.
https://hdl.handle.net/21.15107/rcub_machinery_4908

Bošnjak S, Petković ZD, Gnjatović N, Milenović IL, Milojević G. Strength analysis of bucket wheel excavator’s eight wheel equalizing system. in 13th International Conference "Research and Development in Mechanical Industry" RaDMI 2013. 2013;:1-10.
https://hdl.handle.net/21.15107/rcub_machinery_4908 .

Bošnjak, Srđan, Petković, Zoran D., Gnjatović, Nebojša, Milenović, Ivan Lj., Milojević, Goran, "Strength analysis of bucket wheel excavator’s eight wheel equalizing system" in 13th International Conference "Research and Development in Mechanical Industry" RaDMI 2013 (2013):1-10,
https://hdl.handle.net/21.15107/rcub_machinery_4908 .

TY  - JOUR
AU  - Bošnjak, Srđan
AU  - Petković, Zoran D.
AU  - Atanasovska, Ivana
AU  - Milojević, Goran
AU  - Mihajlović, Vaso M.
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1724
AB  - The supporting truss of the counterweight boom is a vital part of the bucket chain excavator's (BCE) superstructure. The occurrence and propagation of cracks in the supporting truss columns' heads may lead to BCE collapse. The goals of the study presented in this paper were to: (a) diagnose the cause of cracks occurrence; (b) define the reconstruction design of the supporting truss columns and (c) validate the reconstructed structure by numerical-experimental analysis. In order to clarify the causes of cracks occurrence, experimental investigations were performed with the purpose of defining the chemical composition, tensile properties, impact toughness and macrohardness of the columns' material. Metallographic examinations were also conducted. Based on the results of finite elements analyses (FEA) and experimental analyses it can be concluded that cracks are caused by the 'design-in' defects. The redesign solution enabled repair and reconstruction in field conditions, without previously dismantling any substructure of the BCE superstructure. Thereby the time required for performing reconstruction is shortened and indirect costs due to the BCE downtime are considerably diminished. Both the experimental analysis of the stress state of the reconstructed columns in regular working conditions and the failure-free exploitation have confirmed the validity of the reconstruction design, while the BCE excavated approximately 8.5 x 10(6) t of coal and 1.8 x 10(6) m(3) of overburden after the reconstruction.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Engineering Failure Analysis
T1  - Bucket chain excavator: Failure analysis and redesign of the counterweight boom supporting truss columns
EP  - 333
SP  - 322
VL  - 32
DO  - 10.1016/j.engfailanal.2013.04.012
ER  - 

@article{
author = "Bošnjak, Srđan and Petković, Zoran D. and Atanasovska, Ivana and Milojević, Goran and Mihajlović, Vaso M.",
year = "2013",
abstract = "The supporting truss of the counterweight boom is a vital part of the bucket chain excavator's (BCE) superstructure. The occurrence and propagation of cracks in the supporting truss columns' heads may lead to BCE collapse. The goals of the study presented in this paper were to: (a) diagnose the cause of cracks occurrence; (b) define the reconstruction design of the supporting truss columns and (c) validate the reconstructed structure by numerical-experimental analysis. In order to clarify the causes of cracks occurrence, experimental investigations were performed with the purpose of defining the chemical composition, tensile properties, impact toughness and macrohardness of the columns' material. Metallographic examinations were also conducted. Based on the results of finite elements analyses (FEA) and experimental analyses it can be concluded that cracks are caused by the 'design-in' defects. The redesign solution enabled repair and reconstruction in field conditions, without previously dismantling any substructure of the BCE superstructure. Thereby the time required for performing reconstruction is shortened and indirect costs due to the BCE downtime are considerably diminished. Both the experimental analysis of the stress state of the reconstructed columns in regular working conditions and the failure-free exploitation have confirmed the validity of the reconstruction design, while the BCE excavated approximately 8.5 x 10(6) t of coal and 1.8 x 10(6) m(3) of overburden after the reconstruction.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Engineering Failure Analysis",
title = "Bucket chain excavator: Failure analysis and redesign of the counterweight boom supporting truss columns",
pages = "333-322",
volume = "32",
doi = "10.1016/j.engfailanal.2013.04.012"
}

Bošnjak, S., Petković, Z. D., Atanasovska, I., Milojević, G.,& Mihajlović, V. M.. (2013). Bucket chain excavator: Failure analysis and redesign of the counterweight boom supporting truss columns. in Engineering Failure Analysis
Pergamon-Elsevier Science Ltd, Oxford., 32, 322-333.
https://doi.org/10.1016/j.engfailanal.2013.04.012

Bošnjak S, Petković ZD, Atanasovska I, Milojević G, Mihajlović VM. Bucket chain excavator: Failure analysis and redesign of the counterweight boom supporting truss columns. in Engineering Failure Analysis. 2013;32:322-333.
doi:10.1016/j.engfailanal.2013.04.012 .

Bošnjak, Srđan, Petković, Zoran D., Atanasovska, Ivana, Milojević, Goran, Mihajlović, Vaso M., "Bucket chain excavator: Failure analysis and redesign of the counterweight boom supporting truss columns" in Engineering Failure Analysis, 32 (2013):322-333,
https://doi.org/10.1016/j.engfailanal.2013.04.012 . .

TY  - CONF
AU  - Petković, Zoran D.
AU  - Bošnjak, Srđan
AU  - Gnjatović, Nebojša
AU  - Mihajlović, Vaso M.
AU  - Milojević, Goran
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4905
AB  - Bucket wheel excavator SchRs 350/5x12 is one of the oldest mining
machines still operating in open pit mines in Serbia. Bucket wheel drive
gearbox of classical type had to be substituted with planetary one, in order
to eliminate the original design drawbacks. Integration of new bucket
wheel drive solution requires a subtle redesign of the bucket wheel boom.
Calculation verification of bucket wheel boom structure is realized on
basis of comparative stress analysis of the original and redesigned
construction. Sixteen different load cases were analyzed. Results of finite
element analysis are presented in this paper. Presented redesign solution
makes the installation of new bucket wheel drive possible, maintenance
process easier and prolongs the service life of the machine.
PB  - University of Belgrade, Faculty of Mechanical Engineering
C3  - Proceedings of the XX International Conference MHCL’12
T1  - Redesign of the BWE SchRs 350 bucket wheel boom
EP  - 154
SP  - 149
UR  - https://hdl.handle.net/21.15107/rcub_machinery_4905
ER  - 

@conference{
author = "Petković, Zoran D. and Bošnjak, Srđan and Gnjatović, Nebojša and Mihajlović, Vaso M. and Milojević, Goran",
year = "2012",
abstract = "Bucket wheel excavator SchRs 350/5x12 is one of the oldest mining
machines still operating in open pit mines in Serbia. Bucket wheel drive
gearbox of classical type had to be substituted with planetary one, in order
to eliminate the original design drawbacks. Integration of new bucket
wheel drive solution requires a subtle redesign of the bucket wheel boom.
Calculation verification of bucket wheel boom structure is realized on
basis of comparative stress analysis of the original and redesigned
construction. Sixteen different load cases were analyzed. Results of finite
element analysis are presented in this paper. Presented redesign solution
makes the installation of new bucket wheel drive possible, maintenance
process easier and prolongs the service life of the machine.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "Proceedings of the XX International Conference MHCL’12",
title = "Redesign of the BWE SchRs 350 bucket wheel boom",
pages = "154-149",
url = "https://hdl.handle.net/21.15107/rcub_machinery_4905"
}

Petković, Z. D., Bošnjak, S., Gnjatović, N., Mihajlović, V. M.,& Milojević, G.. (2012). Redesign of the BWE SchRs 350 bucket wheel boom. in Proceedings of the XX International Conference MHCL’12
University of Belgrade, Faculty of Mechanical Engineering., 149-154.
https://hdl.handle.net/21.15107/rcub_machinery_4905

Petković ZD, Bošnjak S, Gnjatović N, Mihajlović VM, Milojević G. Redesign of the BWE SchRs 350 bucket wheel boom. in Proceedings of the XX International Conference MHCL’12. 2012;:149-154.
https://hdl.handle.net/21.15107/rcub_machinery_4905 .

Petković, Zoran D., Bošnjak, Srđan, Gnjatović, Nebojša, Mihajlović, Vaso M., Milojević, Goran, "Redesign of the BWE SchRs 350 bucket wheel boom" in Proceedings of the XX International Conference MHCL’12 (2012):149-154,
https://hdl.handle.net/21.15107/rcub_machinery_4905 .

TY  - GEN
AU  - Bošnjak, Srđan
AU  - Petković, Zoran D.
AU  - Gnjatović, Nebojša
AU  - Milenović, Ivan Lj.
AU  - Mihajlović, Vaso M.
AU  - Milojević, Goran
PY  - 2012
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5271
AB  - Роторни багер SRs 1200x24/4x4+VR (G ‐ 3) био је ангажован на ископу јаловине на „Пољу Д“ РБ Колубара. Дана 06.11. 2012. године дошло је до тешке хаварије машине изазване обрушавањем чела етаже.Суштина техничког решења јесте да се редизајном структуре која је претрпела тешко хаваријско оштећење обезбеди повољнија дистрибуција оптерећења, елиминишу геометријски концентратори напона и оствари повољнија дистрибуција крутости унутар структуре. Осим тога, оштра ограничења током развоја редизајниране структуре представљали су захтеви да се реконструкција обави у теренским условима, без демонтаже подсистема носеће конструкције. Тиме је време извођења реконструкције драстично скраћено и вишеструко су смањени губици изазвани застојем машине, односно, целокупног БТО система.
PB  - University of Belgrade, Faculty of Mechanical Engineering
T2  - ТЕХНИЧКО РЕШЕЊЕ (КАТЕГОРИЈА М84)
T1  - Редизајн обртне платформе роторног багера SRs 1200
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5271
ER  - 

@misc{
author = "Bošnjak, Srđan and Petković, Zoran D. and Gnjatović, Nebojša and Milenović, Ivan Lj. and Mihajlović, Vaso M. and Milojević, Goran",
year = "2012",
abstract = "Роторни багер SRs 1200x24/4x4+VR (G ‐ 3) био је ангажован на ископу јаловине на „Пољу Д“ РБ Колубара. Дана 06.11. 2012. године дошло је до тешке хаварије машине изазване обрушавањем чела етаже.Суштина техничког решења јесте да се редизајном структуре која је претрпела тешко хаваријско оштећење обезбеди повољнија дистрибуција оптерећења, елиминишу геометријски концентратори напона и оствари повољнија дистрибуција крутости унутар структуре. Осим тога, оштра ограничења током развоја редизајниране структуре представљали су захтеви да се реконструкција обави у теренским условима, без демонтаже подсистема носеће конструкције. Тиме је време извођења реконструкције драстично скраћено и вишеструко су смањени губици изазвани застојем машине, односно, целокупног БТО система.",
publisher = "University of Belgrade, Faculty of Mechanical Engineering",
journal = "ТЕХНИЧКО РЕШЕЊЕ (КАТЕГОРИЈА М84)",
title = "Редизајн обртне платформе роторног багера SRs 1200",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5271"
}

Bošnjak, S., Petković, Z. D., Gnjatović, N., Milenović, I. Lj., Mihajlović, V. M.,& Milojević, G.. (2012). Редизајн обртне платформе роторног багера SRs 1200. in ТЕХНИЧКО РЕШЕЊЕ (КАТЕГОРИЈА М84)
University of Belgrade, Faculty of Mechanical Engineering..
https://hdl.handle.net/21.15107/rcub_machinery_5271

Bošnjak S, Petković ZD, Gnjatović N, Milenović IL, Mihajlović VM, Milojević G. Редизајн обртне платформе роторног багера SRs 1200. in ТЕХНИЧКО РЕШЕЊЕ (КАТЕГОРИЈА М84). 2012;.
https://hdl.handle.net/21.15107/rcub_machinery_5271 .

Bošnjak, Srđan, Petković, Zoran D., Gnjatović, Nebojša, Milenović, Ivan Lj., Mihajlović, Vaso M., Milojević, Goran, "Редизајн обртне платформе роторног багера SRs 1200" in ТЕХНИЧКО РЕШЕЊЕ (КАТЕГОРИЈА М84) (2012),
https://hdl.handle.net/21.15107/rcub_machinery_5271 .

TY  - CONF
AU  - Bošnjak, Srđan
AU  - Petković, Zoran D.
AU  - Milojević, Goran
AU  - Mihajlović, Vaso M.
PY  - 2011
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5958
AB  - High capacities and key roles in the technological processes cause the extremely high financial losses in the case of high performance machines failures. This paper presents case studies of bucket wheel excavators, stackers and bucket chain reclaimers failures caused by design – in faults. Besides that, paper gives a redesign solutions which are developed by University of Belgrade – Faculty of Mechanical Engineering.
PB  - Faculty of Mechanical Engineering, Kraljevo
C3  - Proceedings of 7th International Triennial Conference Heavy Machinery „HM 2011“
T1  - The Design – in Faults as a Causes of the High Performance Machines Failures
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5958
ER  - 

@conference{
author = "Bošnjak, Srđan and Petković, Zoran D. and Milojević, Goran and Mihajlović, Vaso M.",
year = "2011",
abstract = "High capacities and key roles in the technological processes cause the extremely high financial losses in the case of high performance machines failures. This paper presents case studies of bucket wheel excavators, stackers and bucket chain reclaimers failures caused by design – in faults. Besides that, paper gives a redesign solutions which are developed by University of Belgrade – Faculty of Mechanical Engineering.",
publisher = "Faculty of Mechanical Engineering, Kraljevo",
journal = "Proceedings of 7th International Triennial Conference Heavy Machinery „HM 2011“",
title = "The Design – in Faults as a Causes of the High Performance Machines Failures",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5958"
}

Bošnjak, S., Petković, Z. D., Milojević, G.,& Mihajlović, V. M.. (2011). The Design – in Faults as a Causes of the High Performance Machines Failures. in Proceedings of 7th International Triennial Conference Heavy Machinery „HM 2011“
Faculty of Mechanical Engineering, Kraljevo..
https://hdl.handle.net/21.15107/rcub_machinery_5958

Bošnjak S, Petković ZD, Milojević G, Mihajlović VM. The Design – in Faults as a Causes of the High Performance Machines Failures. in Proceedings of 7th International Triennial Conference Heavy Machinery „HM 2011“. 2011;.
https://hdl.handle.net/21.15107/rcub_machinery_5958 .

Bošnjak, Srđan, Petković, Zoran D., Milojević, Goran, Mihajlović, Vaso M., "The Design – in Faults as a Causes of the High Performance Machines Failures" in Proceedings of 7th International Triennial Conference Heavy Machinery „HM 2011“ (2011),
https://hdl.handle.net/21.15107/rcub_machinery_5958 .

TY  - CONF
AU  - Bošnjak, Srđan
AU  - Petković, Zoran D.
AU  - Mihajlović, Vaso M.
AU  - Milojević, Goran
AU  - Milenović, Ivan Lj.
PY  - 2011
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5954
AB  - One way of solving the improperly parked cars problem is their towing by means of a special vehicle. Hanging the car and putting it onto that vehicle is realized by a special lifting device. This paper presents some design details of the 5 t lifting capacity device.
PB  - SaTCIP (Scientific and Technical Center for Intellectual Property) Ltd.
C3  - Proceedings of 11th International Conference of Research and Development in Mechanical Industry „RaDMI 2011“
T1  - CAD of the special car lifting device
VL  - 1
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5954
ER  - 

@conference{
author = "Bošnjak, Srđan and Petković, Zoran D. and Mihajlović, Vaso M. and Milojević, Goran and Milenović, Ivan Lj.",
year = "2011",
abstract = "One way of solving the improperly parked cars problem is their towing by means of a special vehicle. Hanging the car and putting it onto that vehicle is realized by a special lifting device. This paper presents some design details of the 5 t lifting capacity device.",
publisher = "SaTCIP (Scientific and Technical Center for Intellectual Property) Ltd.",
journal = "Proceedings of 11th International Conference of Research and Development in Mechanical Industry „RaDMI 2011“",
title = "CAD of the special car lifting device",
volume = "1",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5954"
}

Bošnjak, S., Petković, Z. D., Mihajlović, V. M., Milojević, G.,& Milenović, I. Lj.. (2011). CAD of the special car lifting device. in Proceedings of 11th International Conference of Research and Development in Mechanical Industry „RaDMI 2011“
SaTCIP (Scientific and Technical Center for Intellectual Property) Ltd.., 1.
https://hdl.handle.net/21.15107/rcub_machinery_5954

Bošnjak S, Petković ZD, Mihajlović VM, Milojević G, Milenović IL. CAD of the special car lifting device. in Proceedings of 11th International Conference of Research and Development in Mechanical Industry „RaDMI 2011“. 2011;1.
https://hdl.handle.net/21.15107/rcub_machinery_5954 .

Bošnjak, Srđan, Petković, Zoran D., Mihajlović, Vaso M., Milojević, Goran, Milenović, Ivan Lj., "CAD of the special car lifting device" in Proceedings of 11th International Conference of Research and Development in Mechanical Industry „RaDMI 2011“, 1 (2011),
https://hdl.handle.net/21.15107/rcub_machinery_5954 .