基于变厚度壳单元的高速动车组车下斜隔墙结构优化设计

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中图分类号：U270.32 文献标志码：B doi：10.20213/j.cnki. tdcl. 2025.03.19.03

Abstract：As an important part the train，the performance the high-speed EMUs chassis plays a critical role in the safe operation the train. The lightweight design the chassis its components can improve the running speed performance the train.This paper takes the inclined partition wall structure thechasis a certain type high-speed EMUas the research object，the finite element model the whole vehicle is established by HyperMesh， the static strength the carbody is calculatedaccording to EN 12663：201o. By analyzing Von Mises stress nephogram，the most dangerous working conditions inclined partition wallstructure are obtained. To improve the structural performance the inclined partition wall the chassis，the most dangerous working conditions are selected， the topology optimization is carried out by using Workbench stware. To further reduce the stress in this part，the sensitivity analysis the plates around the inclined partition wall is carried out based on the response surface method， the plates with higher sensitivityare selected for size optimization calculation.The results indicate that the position the maximum stress the optimized structure is the lower end the inclined partition wall， the optimized structure stress is reduced compared with the original structure stress under the four analyzed working conditions，which mets the requirements material properties；The mass the optimized structure is reduced by 24.96% compared with the original structure，which achieves the purpose reducing local stress lightweight.

Keywords：high-speed EMU；inclined partition wall； topology optimization；response surface methodology；sensitivity；lightweight

随着高速铁路技术的不断发展，高速列车速度不断提高。（剩余9164字）