Abstract: The article focuses on the structural design and optimization of the frame of Shell's environmentally friendly marathon electric energy-saving vehicle, in order to achieve the goals of improving racing performance and lightweighting. Based on the requirements of the Shell Environmental Marathon, a first generation edge beam energy-saving racing car frame model is designed using CATIA V5 professional software. By using ANSYS Workbench software for finite element analysis, the stress distribution cloud map and displacement distribution cloud map of the frame under bending, twisting, acceleration, turning, and braking conditions under full load are compared and analyzed to verify its stiffness and strength requirements. And based on the results of the 100th topology optimization iteration, the original frame structure is optimized to obtain the final version of the energy-saving racing car frame model, achieving a weight reduction of 21.4%, providing reference for the design optimization of the frame.

Key words: electric energy-saving vehicle frame; finite element method; lightweight; structural design

摘要： 文章针对壳牌汽车环保马拉松电动节能车车架开展了结构设计与优化，以实现赛车性 能的提升和轻量化目标。基于壳牌汽车环保马拉松大赛要求，利用 CATIA V5 专业软件设计 了初代边梁式节能赛车车架模型；通过 ANSYS Workbench 软件有限元分析在满载状态下，车 架在弯曲、扭转、加速、转弯及制动工况下的应力分布云图和位移分布云图，将得到的图形 和数据进行比较分析，以校核其刚度及强度要求；并基于第 100 次拓扑优化迭代结果对原车 架结构进行优化，得到最终版节能赛车车架模型，实现降重 21.4%，为车架的设计优化提供 参考。

关键词: 电动节能车车架；有限元法；轻量化；结构设计