基于高性能计算的曲轴系统动力学与疲劳仿真
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摘要
针对曲轴的动力学仿真和疲劳寿命计算,建立了一种曲轴系统大规模直接计算模型,借助高性能计算(HPC)技术并利用显式有限元算法实现了动力学模型的直接求解,结果详细描述了包括曲轴强度和变形在内的曲轴系统动力学特性。采用全寿命分析方法直接对动力学仿真结果进行曲轴寿命及安全系数的计算,基于应力-时间历程等动态结果进行的疲劳分析结果显得更为真实。计算过程和结果证明了曲轴系统直接动力学及疲劳仿真分析方法的可行性和有效性。
A large-scale,direct computational model of crankshaft system was established for dynamics simulation and calculation of fatigue life of a crankshaft.The dynamics model was solved by use of high-performance-computing(HPC) technique and explicit finite element method.The calculation result describes the crankshaft dynamics characteristics including strength and distortion in detail.The fatigue life evaluation on crankshaft was accomplished by S-N analysis method straightly utilizing dynamics simulation result and the analytical result based on dynamic stress-time history makes it more reasonable.The computational process and calculation result prove the feasibility and validity of this method for a crankshaft system.
A large-scale,direct computational model of crankshaft system was established for dynamics simulation and calculation of fatigue life of a crankshaft.The dynamics model was solved by use of high-performance-computing(HPC) technique and explicit finite element method.The calculation result describes the crankshaft dynamics characteristics including strength and distortion in detail.The fatigue life evaluation on crankshaft was accomplished by S-N analysis method straightly utilizing dynamics simulation result and the analytical result based on dynamic stress-time history makes it more reasonable.The computational process and calculation result prove the feasibility and validity of this method for a crankshaft system.
引文
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10周传月,郑红霞,罗慧强,等.MSC.Fatigue疲劳分析应用与实例[M].北京:科学出版社,2005.
11刘献栋,曾小芳,单颖春.基于试验场实测应变的车辆下摆臂疲劳寿命分析[J].农业机械学报,2009,40(5):34~38.Liu Xiandong,Zeng Xiaofang,Shan Yingchun.Fatigue life analysis of vehicles lower suspension arm based on strain signalmeasured in proving ground[J].Transactions of the Chinese Society for Agricultural Machinery,2009,40(5):34~38.(in Chinese)
2张国庆,黄伯超,浦耿强,等.基于动力学仿真和有限元分析的曲轴疲劳寿命计算[J].内燃机工程,2006,27(1):41~44.Zhang Guoqing,Huang Bochao,Pu Gengqiang,et al.Crankshaft fatigue life calculation based on dynamic simulation andFEA[J].Chinese Internal Combustion Engine Engineering,2006,27(1):41~44.(in Chinese)
3张林波,柳杨,黄鹏程,等.有限元疲劳分析法在汽车工程中的应用[J].计算机辅助工程,2006,15(增刊1):195~198.Zhang Linbo,Liu Yang,Huang Pengcheng,et al.FEM-based fatigue analysis method and application in automobile industry[J].Computer Aided Engineering,2006,15(Supp.1):195~198.(in Chinese)
4张旭,张家泰,胡胜海.一种敏捷曲柄连杆机构的动力学模拟[J].哈尔滨商业大学学报:自然科学版,2002,18(3):278~281.Zhang Xu,Zhang Jiatai,Hu Shenghai.Dynamic simulation of smart crank and connecting rod mechanism[J].Journal ofHarbin University of Commerce:Natural Sciences Edition,2002,18(3):278~281.(in Chinese)
5李潜,施卫东,郭仁惠.基于有限元的污水泵轴疲劳可靠性分析[J].农业机械学报,2007,38(12):208~211.
6 Perillo M,Primavera V,Bonello G,et al.Structual dynamic response of a track chain complete undercarriage system usingvirtual proving ground approach[C]∥10th International LS-DYNA User s Conference,Dearborn,USA,2008.
7 Yoo W S,Kim K N,Kim H W.Developments of multibody system dynamics:computer simulation and experiments[J].Multibody System Dynamics,2007,18:35~58.
8 Hallquist J O.LS-DYNA theory manual[M].Livermore:Livermore Software Technology Corporation,2006.
9郭毅之,金先龙,丁峻宏,等.并行数值仿真技术在盾构隧道地震响应分析中的应用[J].应用基础与工程科学学报,2005,13(1):43~50.Guo Yizhi,Jin Xianlong,Ding Junhong,et al.Parallel numerical simulation techniques in seismic response analysis of shieldtunnel[J].Journal of Basic Science and Engineering,2005,13(1):43~50.(in Chinese)
10周传月,郑红霞,罗慧强,等.MSC.Fatigue疲劳分析应用与实例[M].北京:科学出版社,2005.
11刘献栋,曾小芳,单颖春.基于试验场实测应变的车辆下摆臂疲劳寿命分析[J].农业机械学报,2009,40(5):34~38.Liu Xiandong,Zeng Xiaofang,Shan Yingchun.Fatigue life analysis of vehicles lower suspension arm based on strain signalmeasured in proving ground[J].Transactions of the Chinese Society for Agricultural Machinery,2009,40(5):34~38.(in Chinese)
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