文档介绍：基于梁与接头灵敏度分析的白车身刚度模态优化摘要:白车身结构显著影响整车性能,,通过参数化技术,,分析各结构对扭转刚度、弯曲刚度、,D柱下段、顶盖后横梁、下地板后纵梁等结构的单位质量对扭转刚度贡献量超过5%;后地板横梁、前地板后纵梁、后地板纵梁等结构单位质量对弯曲刚度的贡献量超过4%.通过8处灵敏度较高的结构优化和厚度优化,同时对性能影响小的结构减薄、减件,结合工艺改进,实现白车身质量不增加,%,%,%.关键词:参数化设计;灵敏度分析;结构刚化;接头;梁单元中图分类号:U463文献标志码:AModalOptimizationofBody-in-WhiteStiffnessBasedonSensitivityAnalysisofBeamandJointYAOZaiqi1,2,3,MENYongxin3,LILuoxing1,2,MAOXuefeng4,ZHULing3,MAFangwu5(,HunanUniversity,Changsha410082,China;,HunanUniversity,Changsha410082,China;,GeelyAutomobileResearchInstitute,Hangzhou311228,China;,Shanghai201108,China;,JilinUniversity,Changchun130025,China)Abstract:ItisknownthatBody-in-White(BIW)structuresignificantlyinfluencesthevehicleperformance,,,bendingstiffness,,suc