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汽车安全与节能学报

汽车安全与节能学报 ›› 2016, Vol. 07 ›› Issue (02): 182-187.DOI: 10.3969/j.issn.1674-8484.2016.02.007

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基于拓扑优化的电动汽车车身结构概念设计

王文伟1,2，姜卫远1,2，高丰岭1,2，程雨婷1,2   

  1. 1. 北京理工大学 电动车辆国家工程实验室，北京 100081 ；
    2. 北京电动车辆协同创新中心，北京 100081
  • 收稿日期:2015-09-23 出版日期:2016-06-25 发布日期:2016-07-06
  • 作者简介:王文伟（1980—），男（汉），山东，副教授。E-mail: bitev@bit.edu.cn
  • 基金资助:

    国家自然科学基金资助项目（51205023）；国家科技支撑计划项目（2014BAG02B02）

Conceptual design for electric vehicle body structure based on topology optimization

WANG Wenwei1,2, JIANG Weiyuan1,2, GAO Fengling1,2, CHENG Yuting1,2   

  1. 1. National Engineering Laboratory for Electric Vehicles, Beijing Institute of Technology, Beijing 100081, China;
    2. Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing 100081, China
  • Received:2015-09-23 Online:2016-06-25 Published:2016-07-06

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摘要：

为了探索适用于电动汽车特点且满足性能要求的车身结构，该文在白车身概念设计阶段，建立新的底盘三维拓扑优化设计空间。基于变密度拓扑优化方法中的各向同性固体材料惩罚函数法(SIMP)，考虑到电动汽车车身结构与传统燃油车相比存在的诸多差异，针对弯曲、扭转、正面碰撞和追尾4 个工况，分别制定了优化目标，开展单目标拓扑优化设计，得到电动汽车底盘结构中最优的载荷传递路径以及各支架之间的空间连接方式。结果表明：该优化设计满足电动汽车设计要求，可为车身结构下一步详细设计和其它车型的车身开发提供参考依据。

关键词: 电动汽车, 车身结构, 概念设计, 拓扑优化, 各向同性固体材料惩罚函数法(SIMP)

Abstract:

A new 3-D topology optimization design space of chassis was constructed in the conceptual design stage of an electric vehicle white body to develop the body structure which satisfies the characteristics and requirements of electric vehicle. Single objective topology optimization designs of bending, torsion, and crash
conditions were conducted respectively using topology optimization method based on Solid Isotropic Material with Penalization (SIMP), considering the differences of body structure between electric and combustion-engine automobile. The optimal load transmitting path and the connections of supports for chassis were obtained. The results show that the optimization can meet the design requirements and provide proposal for the detailed design in the next stage or other electric vehicle models.

Key words: electric vehicle, body structure, conceptual desig, topology optimization, solid isotropic material with penalization (SIMP)