摘要
目前重载列车在实际运行过程中出现故障的主要原因是疲劳破坏,尤其是关键部位焊缝出现了疲劳裂纹。为此构建了前从板座角焊缝高分别为6 mm和12 mm的C70车体有限元模型进行疲劳寿命分析,并与不考虑焊缝的有限元模型进行了对比。结果表明:在有限元建模过程中应结合实际考虑模拟焊缝,并且采用疏密结合的方式划分有限元模型更符合实际情况。
At present,main reason for the failure of heavy-duty trains during actual operation is fatigue damage,especially fatigue cracks in the welds of key parts.So the finite element model of the C70 car body with the fillet weld height of the front plate seat 6 mm and 12 mm is constructed for fatigue life analysis,and compares with the finite element model without considering weld.The results show that simulation welds should be considered in combination with reality,and dividing the finite element model with the dense method is more suitable with actual situation in the process of finite element modeling.
作者
王生武
李忠林
Wang Shengwu;Li Zhonglin(College of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University,Liaoning Dalian,116028,China)
出处
《机械设计与制造工程》
2020年第9期65-68,共4页
Machine Design and Manufacturing Engineering
关键词
疲劳寿命
有限元模型
焊缝
fatigue life
finite element model
weld seam
