Neki problemi dinamike i čvrstoće mašina visokih performansi
Some of the problems on dynamics and strength of the high performance machines
Апстракт
Neprekidna eksploatacija u vrlo teškim radnim uslovima dovodi do relativno čestih otkaza podsistema rotornih bagera i pretovarnih mostova za ugalj. Visoko mesto među uzročnicima pomenutih otkaza zauzimaju propusti projektanata - greške u analizi opterećenja, modeliranju i analizi odziva. U radu je izložen originalan postupak identifikacije opterećenja izazvanog otporom kopanja, koji obuhvata sve relevantne konstrukcione parametre, kao i parametre režima rada mašine. Njegova validacija izvršena je merenjima u realnim eksploatacionim uslovima. Osim toga, izložen je i postupak formiranja dinamičkog modela nadgradnje rotornih bagera. On omogućava da se sa dovoljnom tačnošću analizira njen odziv i utvrdi nivo značajnosti parametara pojedinih podsistema. Prezentiran je redizajn obrtne platforme bagera i noseće konstrukcije pretovarnog mosta za ugalj. Rezultati merenja i višegodišnja eksploatacija nedvosmisleno su potvrdili uspešnost primenjenog koncepta redizajna.
Constant exploitation of heavy duty machines, such as the bucket wheel excavator and bridgetype stacker-reclaimer, under the action of highly pronounced dynamic loads, may lead to the failures of their substructures and subassemblies. Unfortunately, high position among the causes of mentioned failures belongs to the designers omissions - mistakes done on the occasion of load analysis, modeling and response analysis. This paper presents an original procedure of calculating external loads caused by force resisting excavation. Model comprises all relevant structural parameters and parameters of duty cycles. Measurements in the real operating conditions have been done in order to establish the credibility of simulation model. Besides that, this paper discusses procedures for dynamic modeling of bucket wheel excavator superstructure. Developed model enables response analysis, with quite satisfactory accuracy, from the engineering point of view. Redesign of the bucket wheel excavator slewing... platform, as well as redesign of the bridge-type stacker-reclaimer structure, is presented. The efficiency of these reconstructions is unquestionably confirmed by failure less service of mentioned machines.
Кључне речи:
rotorni bager / pretovarni most / otpor kopanja / dinamika / čvrstoća / strength / force resisting excavation / dynamics / bucket wheel excavator / bridge-type stacker-reclaimerИзвор:
Journal of Applied Engineering Science, 2010, 8, 1, 1-12Издавач:
- Institut za istraživanja i projektovanja u privredi, Beograd
Финансирање / пројекти:
- Развој машина високих перформанси и метода за идентификацију њиховог одзива на унутрашње и спољашње поремећаје (RS-MESTD-MPN2006-2010-14052)
Колекције
Институција/група
Mašinski fakultetTY - JOUR AU - Bošnjak, Srđan PY - 2010 UR - https://machinery.mas.bg.ac.rs/handle/123456789/1094 AB - Neprekidna eksploatacija u vrlo teškim radnim uslovima dovodi do relativno čestih otkaza podsistema rotornih bagera i pretovarnih mostova za ugalj. Visoko mesto među uzročnicima pomenutih otkaza zauzimaju propusti projektanata - greške u analizi opterećenja, modeliranju i analizi odziva. U radu je izložen originalan postupak identifikacije opterećenja izazvanog otporom kopanja, koji obuhvata sve relevantne konstrukcione parametre, kao i parametre režima rada mašine. Njegova validacija izvršena je merenjima u realnim eksploatacionim uslovima. Osim toga, izložen je i postupak formiranja dinamičkog modela nadgradnje rotornih bagera. On omogućava da se sa dovoljnom tačnošću analizira njen odziv i utvrdi nivo značajnosti parametara pojedinih podsistema. Prezentiran je redizajn obrtne platforme bagera i noseće konstrukcije pretovarnog mosta za ugalj. Rezultati merenja i višegodišnja eksploatacija nedvosmisleno su potvrdili uspešnost primenjenog koncepta redizajna. AB - Constant exploitation of heavy duty machines, such as the bucket wheel excavator and bridgetype stacker-reclaimer, under the action of highly pronounced dynamic loads, may lead to the failures of their substructures and subassemblies. Unfortunately, high position among the causes of mentioned failures belongs to the designers omissions - mistakes done on the occasion of load analysis, modeling and response analysis. This paper presents an original procedure of calculating external loads caused by force resisting excavation. Model comprises all relevant structural parameters and parameters of duty cycles. Measurements in the real operating conditions have been done in order to establish the credibility of simulation model. Besides that, this paper discusses procedures for dynamic modeling of bucket wheel excavator superstructure. Developed model enables response analysis, with quite satisfactory accuracy, from the engineering point of view. Redesign of the bucket wheel excavator slewing platform, as well as redesign of the bridge-type stacker-reclaimer structure, is presented. The efficiency of these reconstructions is unquestionably confirmed by failure less service of mentioned machines. PB - Institut za istraživanja i projektovanja u privredi, Beograd T2 - Journal of Applied Engineering Science T1 - Neki problemi dinamike i čvrstoće mašina visokih performansi T1 - Some of the problems on dynamics and strength of the high performance machines EP - 12 IS - 1 SP - 1 VL - 8 UR - https://hdl.handle.net/21.15107/rcub_machinery_1094 ER -
@article{ author = "Bošnjak, Srđan", year = "2010", abstract = "Neprekidna eksploatacija u vrlo teškim radnim uslovima dovodi do relativno čestih otkaza podsistema rotornih bagera i pretovarnih mostova za ugalj. Visoko mesto među uzročnicima pomenutih otkaza zauzimaju propusti projektanata - greške u analizi opterećenja, modeliranju i analizi odziva. U radu je izložen originalan postupak identifikacije opterećenja izazvanog otporom kopanja, koji obuhvata sve relevantne konstrukcione parametre, kao i parametre režima rada mašine. Njegova validacija izvršena je merenjima u realnim eksploatacionim uslovima. Osim toga, izložen je i postupak formiranja dinamičkog modela nadgradnje rotornih bagera. On omogućava da se sa dovoljnom tačnošću analizira njen odziv i utvrdi nivo značajnosti parametara pojedinih podsistema. Prezentiran je redizajn obrtne platforme bagera i noseće konstrukcije pretovarnog mosta za ugalj. Rezultati merenja i višegodišnja eksploatacija nedvosmisleno su potvrdili uspešnost primenjenog koncepta redizajna., Constant exploitation of heavy duty machines, such as the bucket wheel excavator and bridgetype stacker-reclaimer, under the action of highly pronounced dynamic loads, may lead to the failures of their substructures and subassemblies. Unfortunately, high position among the causes of mentioned failures belongs to the designers omissions - mistakes done on the occasion of load analysis, modeling and response analysis. This paper presents an original procedure of calculating external loads caused by force resisting excavation. Model comprises all relevant structural parameters and parameters of duty cycles. Measurements in the real operating conditions have been done in order to establish the credibility of simulation model. Besides that, this paper discusses procedures for dynamic modeling of bucket wheel excavator superstructure. Developed model enables response analysis, with quite satisfactory accuracy, from the engineering point of view. Redesign of the bucket wheel excavator slewing platform, as well as redesign of the bridge-type stacker-reclaimer structure, is presented. The efficiency of these reconstructions is unquestionably confirmed by failure less service of mentioned machines.", publisher = "Institut za istraživanja i projektovanja u privredi, Beograd", journal = "Journal of Applied Engineering Science", title = "Neki problemi dinamike i čvrstoće mašina visokih performansi, Some of the problems on dynamics and strength of the high performance machines", pages = "12-1", number = "1", volume = "8", url = "https://hdl.handle.net/21.15107/rcub_machinery_1094" }
Bošnjak, S.. (2010). Neki problemi dinamike i čvrstoće mašina visokih performansi. in Journal of Applied Engineering Science Institut za istraživanja i projektovanja u privredi, Beograd., 8(1), 1-12. https://hdl.handle.net/21.15107/rcub_machinery_1094
Bošnjak S. Neki problemi dinamike i čvrstoće mašina visokih performansi. in Journal of Applied Engineering Science. 2010;8(1):1-12. https://hdl.handle.net/21.15107/rcub_machinery_1094 .
Bošnjak, Srđan, "Neki problemi dinamike i čvrstoće mašina visokih performansi" in Journal of Applied Engineering Science, 8, no. 1 (2010):1-12, https://hdl.handle.net/21.15107/rcub_machinery_1094 .