Failure analysis and reconstruction design of the slewing platform mantle of the bucket wheel excavator O&K SchRs 630
Abstract
The slewing platform is the fundamental part of the bucket wheel excavator (BWE) structure. The occurrence and propagation of cracks in the zones of the slewing platform mantle holes, may probably lead to BWE collapse. The goals of the study presented in the paper were to: (1) Diagnose the cause of cracks occurrence; (2) Define the reconstruction design of the mantle; (3) Verify the reconstructed structure by numerical-experimental analysis. The identification of the stress-strain state of the mantle is done by applying the finite element method. Experimental stress analysis of the reconstructed mantle's structure is executed two times in the BWE real working conditions, using methods of strain gauges. The maximum measured value of stress is about 10% lower in relation to the calculated value of stress for the studied load case. Speaking from the engineering standpoint, the mentioned deviation is quite acceptable, particularly having in mind the stochastic character of the excavation p...rocess. Besides experimental investigations, the validity of the presented reconstruction also unquestionably confirms the mentioned failure-free exploitation, while the BWE excavated more than 2.6 x 10(6) t of coal after the reconstruction.
Keywords:
Stress analysis / Repairs / Finite element analysis / Cracks / Bucket wheel excavatorSource:
Engineering Failure Analysis, 2011, 18, 2, 658-669Publisher:
- Pergamon-Elsevier Science Ltd, Oxford
Funding / projects:
- Sustainability and improvement of mechanical systems in energetic, material handling and conveying by using forensic engineering, environmental and robust design (RS-MESTD-Technological Development (TD or TR)-35006)
DOI: 10.1016/j.engfailanal.2010.09.035
ISSN: 1350-6307
WoS: 000288881300015
Scopus: 2-s2.0-79951679264
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Institution/Community
Mašinski fakultetTY - JOUR AU - Bošnjak, Srđan AU - Pantelić, Milorad P. AU - Zrnić, Nenad AU - Gnjatović, Nebojša AU - Đorđević, Miloš PY - 2011 UR - https://machinery.mas.bg.ac.rs/handle/123456789/1158 AB - The slewing platform is the fundamental part of the bucket wheel excavator (BWE) structure. The occurrence and propagation of cracks in the zones of the slewing platform mantle holes, may probably lead to BWE collapse. The goals of the study presented in the paper were to: (1) Diagnose the cause of cracks occurrence; (2) Define the reconstruction design of the mantle; (3) Verify the reconstructed structure by numerical-experimental analysis. The identification of the stress-strain state of the mantle is done by applying the finite element method. Experimental stress analysis of the reconstructed mantle's structure is executed two times in the BWE real working conditions, using methods of strain gauges. The maximum measured value of stress is about 10% lower in relation to the calculated value of stress for the studied load case. Speaking from the engineering standpoint, the mentioned deviation is quite acceptable, particularly having in mind the stochastic character of the excavation process. Besides experimental investigations, the validity of the presented reconstruction also unquestionably confirms the mentioned failure-free exploitation, while the BWE excavated more than 2.6 x 10(6) t of coal after the reconstruction. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - Engineering Failure Analysis T1 - Failure analysis and reconstruction design of the slewing platform mantle of the bucket wheel excavator O&K SchRs 630 EP - 669 IS - 2 SP - 658 VL - 18 DO - 10.1016/j.engfailanal.2010.09.035 ER -
@article{ author = "Bošnjak, Srđan and Pantelić, Milorad P. and Zrnić, Nenad and Gnjatović, Nebojša and Đorđević, Miloš", year = "2011", abstract = "The slewing platform is the fundamental part of the bucket wheel excavator (BWE) structure. The occurrence and propagation of cracks in the zones of the slewing platform mantle holes, may probably lead to BWE collapse. The goals of the study presented in the paper were to: (1) Diagnose the cause of cracks occurrence; (2) Define the reconstruction design of the mantle; (3) Verify the reconstructed structure by numerical-experimental analysis. The identification of the stress-strain state of the mantle is done by applying the finite element method. Experimental stress analysis of the reconstructed mantle's structure is executed two times in the BWE real working conditions, using methods of strain gauges. The maximum measured value of stress is about 10% lower in relation to the calculated value of stress for the studied load case. Speaking from the engineering standpoint, the mentioned deviation is quite acceptable, particularly having in mind the stochastic character of the excavation process. Besides experimental investigations, the validity of the presented reconstruction also unquestionably confirms the mentioned failure-free exploitation, while the BWE excavated more than 2.6 x 10(6) t of coal after the reconstruction.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "Engineering Failure Analysis", title = "Failure analysis and reconstruction design of the slewing platform mantle of the bucket wheel excavator O&K SchRs 630", pages = "669-658", number = "2", volume = "18", doi = "10.1016/j.engfailanal.2010.09.035" }
Bošnjak, S., Pantelić, M. P., Zrnić, N., Gnjatović, N.,& Đorđević, M.. (2011). Failure analysis and reconstruction design of the slewing platform mantle of the bucket wheel excavator O&K SchRs 630. in Engineering Failure Analysis Pergamon-Elsevier Science Ltd, Oxford., 18(2), 658-669. https://doi.org/10.1016/j.engfailanal.2010.09.035
Bošnjak S, Pantelić MP, Zrnić N, Gnjatović N, Đorđević M. Failure analysis and reconstruction design of the slewing platform mantle of the bucket wheel excavator O&K SchRs 630. in Engineering Failure Analysis. 2011;18(2):658-669. doi:10.1016/j.engfailanal.2010.09.035 .
Bošnjak, Srđan, Pantelić, Milorad P., Zrnić, Nenad, Gnjatović, Nebojša, Đorđević, Miloš, "Failure analysis and reconstruction design of the slewing platform mantle of the bucket wheel excavator O&K SchRs 630" in Engineering Failure Analysis, 18, no. 2 (2011):658-669, https://doi.org/10.1016/j.engfailanal.2010.09.035 . .