铁道科学与工程学报2026，Vol.23Issue(3)：1017-1031,15.DOI:10.19713/j.cnki.43-1423/u.T20250747
高速列车车体断面型材协同优化研究
Collaborative optimization of high-speed train car body section profiles
摘要
Abstract
With the continuous increase in the operational speed of high-speed trains,high demands are placed on the stiffness,modal performance,and lightweight design of the car body.This study established a reference design scheme by extracting and transferring cross-sectional features from existing car body profiles,using the profile contour as design boundaries,with comprehensive performance evaluation serving as the optimization benchmark.Through global optimization strategies,the effects of volume fraction and load ratios on topology optimization of integrated cross-sectional profiles were investigated.The individual profile optimization results under various working conditions revealed the intrinsic mechanism behind material deficiency phenomena in central roof,sidewall and floor regions during global optimization.To address discontinuous rib distributions between panels in global optimization,a coordinated optimization strategy was proposed.And it established a systematic framework from individual profile topology optimization to full-vehicle dimensional optimization.For individual profiles,an integrated topology optimization method was developed based on beam pure bending theory,achieving equivalent transformation from distributed to concentrated loads,which not only resolved material deficiency caused by low strain energy in central regions but also coordinated mechanical properties under multi-directional loading.The optimized profiles were then combined to form new cross-sectional configurations.For the full-vehicle structure,a state-coordinated dimensional optimization method was established by utilizing no-load optimization results as initial designs for fully-equipped conditions.The optimized design can demonstrate significant improvements:enhanced performance in individual profiles,10.741%mass reduction,and 21.819%and 9.832%increases in equivalent bending stiffness and first-order vertical bending frequency respectively compared to the reference design.This research can provide both practical optimization methodologies for high-speed train car body design and novel insights for complex structural optimization challenges.关键词
高速列车车体/拓扑优化/尺寸优化/轻量化/模态/刚度Key words
high-speed train car body/topology optimization/size optimization/lightweighting/modal/stiffness分类
交通工程引用本文复制引用
朱耘瑞,廖琳,马荣谦,姚松..高速列车车体断面型材协同优化研究[J].铁道科学与工程学报,2026,23(3):1017-1031,15.基金项目
中国国家铁路集团有限公司科技研究开发计划系统性重大项目(P2020J024) （P2020J024）
