某车型纯电汽车动力大支架强度优化分析

The Research Analysis for Bracket of Powertrain Base on Some Automobile

基于有限元仿真平台,对某新开发纯电动汽车的动力大支架进行结构强度分析。根据分析流程搭建有限元模型,运用Nastran求解器进行求解,初步分析结果得出,动力大支架的结构强度安全裕度较低;针对出现的问题对动力大支架的结构进行优化,优化后新支架的最大应力从330.2 MPa下降到191.6 MPa,远低于材料许用应力340 MPa。结构强度得到了较好的改善,可用于指导生产。

Base on finite element simulation platform,the structural strength analysis of the power bracket of a newly developed pure electric vehicle was carried out.A finite element model was built according to the analysis process.Nastran software was used to solve the finite element.Preliminary analysis results show that the safety margin of the structural strength of the large power support is low.After the optimization of the structure of the large power support,the maximum stress of the new support drops from 330.2 MPa to 191.6 MPa,much lower than the allowable stress of 340 MPa.And the structural strength has been improved so as to guide production.