某新能源汽车后副车架疲劳失效分析与优化  

FATIGUE ANALYSIS AND OPTIMIZATION OF A NEW ENERGY VEHICLE REAR SUBFRAME

作　　者：聂小勇 谭永发 谢世坤[2] 何君儒 刘伟强[2] NIE Xiao-yong;TAN Yong-fa;XIE Shi-kun;HE jun-ru;LIU Wei-qiang(Jiangxi jiangling group new energy vehicle co.LTD,Nanchang,Jiangxi 330052,China;School of Mechanical and Electrical Engineering,Jinggangshan University,Ji’an,Jiangxi 343009,China)

机构地区：[1]江西江铃新能源汽车有限公司,江西南昌330052 [2]井冈山大学机电学院,江西吉安343009

出　　处：《井冈山大学学报（自然科学版）》2020年第5期59-65,共7页Journal of Jinggangshan University (Natural Science)

基　　金：国家自然科学基金(51165010);江西省自然科学基金项目(20181BAB206028);江西省教育厅科学技术研究项目(GJJ160732,GJJ170651)。

摘　　要：为了解决某新能源汽车后副车架台架试验的疲劳失效问题,首先基于Hypermesh软件建立后副车架有限元模型;其次分别对其进行刚度分析、强度分析和疲劳分析。结果表明:其模态小于目标值;其最大应力小于材料屈服;其本体及其焊缝的最大损伤值超出目标值,最大损伤位置与失效位置相同。然后,通过填充其漏液孔进行结构优化,优化之后其各项性能均能够满足设计要求。最后对其优化方案进行台架试验验证,满足台架疲劳要求。To solve the fatigue failure problem of new energy vehicle rear subframe,Firstly,we establish rear subframe model based on Hypermesh software.Secondly,we analyze its stiffness performance,strength and fatigue.The results show that the model is less than the target value,its maximum stress value is less than the material yield,the maximum damage value of the body and its weld exceed the target value,the location of maximum damage is the same as the failure location.Then,we optimize the structure of rear subframe through filling the leakage hole.By this method,all the performance can meet the design requirements.Lastly,we verify the optimization method through bench strength test,and it can meet bench fatigue requirement.

关 键 词：后副车架 失效 模态 强度 疲劳 优化 

分 类 号：TH16[机械工程—机械制造及自动化]