用虚拟疲劳样机技术分析转8A型转向架侧架的疲劳寿命  

Analysis of Fatigue Life of Z8A Bogie Sideframe with Virtual Prototype Technology

作　　者：孟广伟[1] 王成国[1] 刘敬辉[1] 原亮明[1] 

机构地区：[1]铁道部科学研究院机辆所,北京100081

出　　处：《中国铁道科学》2002年第4期8-11,共4页China Railway Science

基　　金：铁道部科技研究开发计划项目 (2 0 0 0J41)

摘　　要：虚拟疲劳样机技术是在计算机虚拟现实环境下 ,以计算机辅助设计 (CAD) ,有限元法 (FEM)和多体系统动力学分析 (MBSDS)为基础 ,通过数值仿真计算 ,得到实际构件上的应力分布 ,再根据这些应力以及作用在构件上的通过数值仿真得到的随机载荷和相应的材料特性曲线 ,应用疲劳分析软件 (MSC FATIGUE) ,预测实际构件的疲劳寿命。采用虚拟疲劳样机技术 ,预测了转 8A型转向架侧架的疲劳寿命 ,从计算所得的相应的疲劳寿命分布图中 ,可直观的判断出转 8A型转向架侧架的疲劳寿命薄弱位置 ,即侧架最可能发生疲劳失效的位置为轴箱转角处 ,该计算结果与试验结果有良好的一致性 ,为今后进行转 8A型转向架的可靠性设计提供了必要的计算依据。The technology of virtual prototype is used to get the stress distribution in a computer simulation environment, with CAD design, and on FEM and multibody system dynamics software (MBSDS) basis. Then according to these stresses and the random load applied to the structure and obtained through simulation and the corresponding material characteristic curve, the fatigue life of the real structure is predicted with the fatigue analysis software (MSC/FATIQUE). The paper uses the virtual fatigue in the prediction of the Z8A bogie sideframe to meet the requirement of fatigue intensity stipulated in the specifications. The weak location of the fatigue life is directly shown in the corresponding fatigue life distribution diagram obtained from calculation. It is shown that fatigue failure is likely to occur in the corner of the axlebox of the sideframe. The calculation and the test agree with each other in results, thus providing the necessary calculation basis for the reliability design of future Z8A bogie.

关 键 词：侧架 虚拟设计 疲劳样机 转8A型 转向架 疲劳寿命 FEM 铁路车辆 货车 

分 类 号：U270.331[机械工程—车辆工程] U272[交通运输工程—载运工具运用工程]