基于随机振动疲劳分析的动力电池支架改进及轻量化设计  

Improvement and lightweight design of power battery bracket based on random vibration fatigue analysis

作　　者：张政[1] 蒋兵[1] 张贵万[1] 刘文慧 李峰[1] 尹杨平 ZHANG Zheng;JIANG Bing;ZHANG Guiwan;LIU Wenhui;LI Feng;YIN Yangping(Jetour Division,Chery Automobile Co.,Ltd.,Wuhu 241000,Anhui,China)

机构地区：[1]奇瑞汽车股份有限公司捷途品牌事业部,安徽芜湖241000

出　　处：《计算机辅助工程》2023年第2期11-15,共5页Computer Aided Engineering

摘　　要：为提高某纯电动轻卡电池支架的疲劳寿命,采用随机振动疲劳分析方法对支架进行分析和轻量化设计,利用有限元软件搭建动力电池支架的随机振动疲劳分析模型,并对比改进前后动力电池支架的疲劳寿命和结构质量。结果显示:在保证动力电池支架结构疲劳寿命的基础上,改进方案的动力电池支架结构质量可减轻约19.5%。试验场强化路试试验验证改进方案的有效性。To improve the fatigue life of battery bracket of a pure electric light truck,the random vibration fatigue analysis method is used for the analysis and lightweight design of the power battery bracket.The random vibration fatigue analysis model for the power battery bracket is built using finite element analysis software,and the fatigue life and structural mass of the improved power battery bracket is compared with the original one.The result shows that,on the basis of ensuring the fatigue life of the power battery bracket,the improved structure of the power battery bracket can reduce the mass about 19.5%.The effectiveness of the improved proposal is verified by the proving ground fatigue road test.

关 键 词：电池支架 随机振动 PSD谱 疲劳寿命 轻量化 

分 类 号：U463.32[机械工程—车辆工程] TB115.1[交通运输工程—载运工具运用工程]