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主办单位:重庆大学
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国际标准刊号:ISSN 1000-582X
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纯电动汽车驱动桥的轻量化设计
林利红, 李雨龙, 李聪波, 赵来杰
重庆大学 机械工程学院, 重庆 400044
摘要:
为解决电驱动桥非同轴问题,减少环境污染,进行了电驱动桥的轻量化设计。提出一种新型纯电动汽车同轴一体化电驱动桥结构,在4种极限工况下进行了桥壳强度、刚度有限元仿真分析。根据有限元分析结果,以桥壳厚度为优化变量、以桥壳质量为目标函数建立电驱动桥桥壳轻量化优化模型。以目标驱动方法对轻量化模型进行求解,对比分析桥壳厚度与驱动桥桥壳最大位移变形、最大应力及质量之间的响应曲面关系。对轻量化设计后的电驱动桥在4种极限工况下进行仿真分析,将分析结果与轻量化设计前进行对比,结果显示轻量化后驱动桥减重8.4%,轻量化效果明显且能够满足驱动后桥使用要求。
关键词:  电动汽车  电驱动桥  轻量化设计
DOI:10.11835/j.issn.1000-582X.2019.04.003
分类号:U463.218
基金项目:国家自然科学基金资助项目(51475059);教育部"创新团队发展计划"(IRT_15R64)。
Lightweight design of electric rear axle of pure electric vehicle
LIN Lihong, LI Yulong, LI Congbo, ZHAO Laijie
College of Mechanical Engineering, Chongqing University, Chongqing 400044, P. R. China
Abstract:
In order to solve the non-coaxial problem of electric rear axle and reduce environmental pollution, the lightweight design of electric rear axle is carried out. A novel coaxial integrated electrical rear axle system is proposed in this paper. The strength and stiffness simulation is analysed under four kinds of limiting operational conditions. Based on the finite element analysis results, an electric rear axle housing lightweight optimization model is established with the axle thickness as the design variables and the axle housing quality as the objective function. Goal-driven optimization scheme is used to solve the optimization model, and the response relationship between the axle thickness and the maximum displacement, maximum stress and the total mass is analyzed. The simulation analysis about the optimized electric rear axle is done based on the four kinds of limiting operational conditions, and the results show that the electrical rear axle reduces its weight by 8.4% compared with that before the lightweight, meeting the requirement of electric drive rear axle.
Key words:  electrical vehicle  electrical rear axle  lightweight design
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