基于相对灵敏度分析的平车车体结构优化

打开文本图片集

中图分类号：TH122 文献标志码：B 文章编号：1671-5276（2025）06-0245-06

Abstract：Inresponse totheproblemoflowfirst-orderverticalbending modalfrequencyofacertainflatcarbodystelstructure， therelativesensitivityanalysismethodisusedtodeterminethethicknessoftheplatecomponentswithsignificantimprovemetof the modalfrequencyofcarbody，but without drasticalcarbodyweightincreaseasthedesignvariableforoptimizing thecarbody design.Afteroptimization，thefirst-orderverticalbendingfrequencyof thesteelstructureofthevehiclebodyisincreasedby （2 6.2% ，and theweight of thevehiclebodyisreducedby1O19kg.Thecomparison with theoptimizationresultsof direct sensitivityanalysisisconductedtoveriftheefectivenessoftheelativesensitityanalysismethodinimprovingthfistder verticalbendingfrequencyoftheflatcarbodyandreducingthetotalweightofthecarbody.Afteroptimization，thestaticstrength and stiffness of the vehicle body meet the requirements.

Keywords：flat car body；modal frequency；size optimization；relative sensitivity； finite element analysis

0 引言

车体轻量化是铁道车辆结构优化的重要研究内容。（剩余6429字）