侯芊荷　丁殿勇　白鑫　韩嘉伟　黄汉彰　董晓武

摘 要：本文面向电动汽车电机轻量化研究，以某电机驱动电动汽车为目标对象，调查电机轻量化技术路径，分析其可行性，进行电动汽车电机壳体轻量化设计，为电动汽车轻量化提供技术参考和理论支持。本文对纯电动汽车电机壳体在6种不同工况下的强度进行了分析评价，使用Hypermesh、Optistruct等软件，运用拓扑优化方法，优化设计了纯电动汽车电机壳体，保证其在不同运行工况下强度均满足使用要求，以降低电机壳体的质量为设计目标，改善电动汽车的能源利用率。结果显示，经过优化后电机壳体的质量相较之前下降了12.3%，为电动汽车电机壳体的优化设计提供了经验。

关键词：电动汽车电机壳体 拓扑优化 轻量化

Research on the Lightweight of Electric Vehicle Motor Housing

Hou Qianhe Ding Dianyong Bai Xin Han Jiawei Huang Hanzhang Dong Xiaowu

Abstract：This paper is oriented to the research on the lightweight of electric vehicle motors，taking a motor-driven electric vehicle as the target object，investigating the technical path of the motor lightweight，analyzing its feasibility，and carrying out the lightweight design of the electric vehicle motor housing，and providing a technical reference for the lightweight of electric vehicles and theoretical support. This paper analyzes and evaluates the strength of pure electric vehicle motor housing under 6 different working conditions. Using Hypermesh，Optistruct and other software，and the topology optimization methods，the pure electric vehicle motor housing is optimized to ensure that it is in different conditions. Under the operating conditions，the strength meets the requirements of use，and the design goal is to reduce the quality of the motor housing to improve the energy efficiency of electric vehicles. The results show that the quality of the motor housing after optimization has dropped by 12.3% compared to before，which provides experience for the optimal design of the motor housing of electric vehicles.

Key words：electric car motor housing，topology optimization，lightweight

近年来，我国纯电动汽车保有量迅速增多，已逐渐成为未来发展的趋势。在制约纯电动汽车发展的影响因素中，汽车质量的增加将对动力性和燃油经济性产生较大的影响。电动机作为电动汽车驱动系统中不可缺少的零件，其结构较为复杂，质量一般较大。根据资料显示，将汽车的整备质量下降十分之一，纯电动汽车的续航里程将会被提升百分之十至百分之二十 。轻量化被视为实现节能减排最经济且行之有效的手段。王良模等[1]针对某越野车在行驶路况复杂、载荷多变等情况下，动力总成壳体出现开裂的现象，运用有限元模态分析和模态试验相结合的方法，研究了动力总成的振动模态，并对其进行了结构优化。……