纯电动公路客车车身骨架高刚度轻量化设计

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关键词：纯电动公路客车；车身骨架；尺寸优化；轻量化；多目标优化；多目标尺寸优化 中图分类号： 文献标识码：A DOI：10.3969/j.issn.1674-8484.2025.03.009

Abstract：A multi-objective structural design was optimized fora pure electric coach bodyframe to enhance thestiffnessandreduce the mass.Afiniteelementmodelof thebodyframe was established，withthespecific pure electric coach as the research subject，to determine weight coefcients for static and dynamic working conditions.The modified frame structure underwent variable grouping and multi-condition multi-objective dimensional optimization.Static analysis and modal analysis were subsequently conducted.The results show that the optimizedbody frame achieveaminimum 4% enhancement in comprehensive average stiffness witha 7% improvement inaveragedynamic frequencyof the first fourorders，andwitha 1% mass reduction. Therefore，it makes vehicle frame performance being effectivelyupgraded while maintaining original massor achieving controlled lightweight effects.

Keywords：pureelectric highwaypassenger buses;bodyframes;sizeoptimization;lightweightdesign;multi objective optimization;multi-size optimization

为了降低纯电动公路客车能耗并提高客车安全性与行驶里程，已有学者对其进行车身骨架轻量化和结构优化研究[1-2]

目前车身骨架的轻量化主要包括3类：使用轻质材料，使用先进制造工艺和改进结构[3]，去除对车身性能影响较小的零部件。（剩余10571字）