基于模态置信的商用车车架模态分析与结构优化

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中图分类号：U463 收稿日期：2025-07-12 DOI： 10.19999/j.cnki.1004-0226.2025.09.008

Modal Analysis and Structure Optimization of Commercial Vehicle Frame Based on Modal Confidence

Xia YufangYang ShaogangCao Yuan Liu Zongsheng Zhang Zhuo Dongfeng Commercial Vehicle Technical Center，Wuhan 43010o，China

Abstract：Theidlevibrationlevelofatractorispoor.Intheframemodetestoftheproblemvehicle，thetestresultsshowthatthe firstmodefrequencyoftheframeisveryclosetotheexcitationfrequencygeneratedbytheidleignitionandtheframeresonanceleads tothepoorvibationisolatonofthepowertransuspensonistalltioendandtergeidevbrationUsingtemodalcofidcanalysis method，tesimulationmodelofthevehiclefiniteeementmodelisevaluatedforbenchmarking.Accordingtotheweaklinksfthe frame，thestructuraloptimiationshemeisproposdndtheoptimiationectiseriidthoughsimulatinaalysis，otopo vide theoretical basis and practical guidance for the design of commercial vehicle frame.

Keywords：Frame;Modal analysis;Modal confidence

1前言

车架作为车辆承载结构的关键弹性支承系统，在动态激励载荷作用下会产生非线性振动响应。（剩余4011字）