电驱动总成差速器壳体疲劳寿命分析  

Fatigue Life Analysis of the Differential Case of Electric Drive Assembly

作　　者：邹喜红[1] 苟林林 袁冬梅[1] 王超[1] 蒋明聪 Zou Xihong;Gou Linlin;Yuan Dongmei;Wang Chao;Jiang Mingcong(Key Laboratory of Advanced Manufacturing and Test Technology for Automobile Parts of Ministry of education,Chongqing University of Technology,Chongqing 400054)

机构地区：[1]重庆理工大学汽车零部件先进制造技术教育部重点实验室,重庆400054

出　　处：《汽车技术》2022年第1期46-52,共7页Automobile Technology

基　　金：国家重点研发计划项目(2018YFB0106100);电动汽车产业技术创新战略联盟定向共性技术项目(CA2019);重庆市科技重大主题专项重点研发项目(cstc2018jszx-cyztzxX0005)。

摘　　要：为提高电驱动总成差速器壳体疲劳寿命分析的准确性,基于实测载荷谱和台架试验开展疲劳寿命分析。首先建立差速器壳体有限元模型,基于液压伺服系统、应变测试系统等设计了动态载荷加载试验系统,并分别进行了相同条件下的试验和有限元分析,验证了有限元模型的精确性,在此基础上,基于实测载荷谱,综合运用验证后的有限元模型、名义应力法、壳体修正S-N曲线和修正平均应力等,对差速器壳体疲劳寿命进行了分析,结果表明,疲劳破坏位置与实车行驶时疲劳破坏位置一致。In order to improve the accuracy of the fatigue life analysis of the differential housing of the electric drive assembly,this paper analyzes the fatigue life based on the measured load spectrum and bench test.Firstly,a finite element model of the differential housing is established,and a dynamic load loading test system is designed based on the hydraulic servo system and strain test system,and then the test and finite element analysis under the same conditions are carried out respectively to verify the accuracy of the finite element model.On this basis,fatigue life of the differential shell is analyzed based on the measured load spectrum,which comprehensively adopt verified finite element model,nominal stress method,shell modified S-N curve and modified average stress,etc..The results show that the analyzed fatigue damage position is consistent with the fatigue damage position when the vehicle is driving.

关 键 词：电驱动总成差速器壳体 模型验证 台架试验 寿命分析 

分 类 号：U467.3[机械工程—车辆工程]