农场电动汽车电池模组随机振动疲劳分析

Random Vibration Fatigue Analysis of Battery Modules for Farm Electric Vehicles

为了得到随机振动对电动汽车电池模组的影响,应用大型有限元分析软件MSC.Patran/Nastran,对某农场电动汽车的电池模组进行随机振动分析,从而得出各个组成部件的应力、应变和位移结果;并采用3-Sigma法来进行疲劳寿命预测。研究结果表明:该电池模组在随机振动工况下X、Y和Z 3个方向结构和部件满足正常使用的强度要求,Y方向的疲劳寿命预估为55年,满足设计要求,研究为车辆电池模组随机振动分析提供参考。

In order to obtain the influence of random vibration on the battery modules of electric vehicles,the large finite element analysis software MSC.Patran/Nastran was used to analyze the random vibration of the battery modules of a farm electric vehicle,and the results of stress,strain and displacement of each component were obtained.The 3-Sigma method was used to predict the fatigue life.The results show that the structure and components of the battery module in X,Y and Z directions meet the strength requirements for normal use under the random vibration condition,and the fatigue life of the battery module in Y direction is estimated to be 55 years,which meets the design requirements.The study provides reference for the random vibration analysis of the vehicle battery module.