某运动型多用途车怠速振动分析及优化  

Idle Vibration Analysis and Optimization of a Sport Utility Vehicle

作　　者：陈清爽 钟秤平 郭荣[3,4] 王理周 罗鑫 肖俊平 CHEN Qingshuang;ZHONG Chengping;GUO Rong;WANG Lizhou;LUO Xin;XIAO Junping(Jiangling Motor Co.,Ltd.,Nanchang 330006,China;Jiangxi Province Key Laboratory of Vehicle Noise and Vibration,Nanchang 330006,China;New Clean Energy Automotive Engineering Center,Tongji University,Shanghai 201804,China;School of Automotive Studies,Tongji University,Shanghai 201804,China)

机构地区：[1]江铃汽车股份有限公司,南昌330006 [2]江西省汽车噪声与振动重点实验室,南昌330006 [3]同济大学新能源汽车工程中心,上海201804 [4]同济大学汽车学院,上海201804

出　　处：《振动与冲击》2025年第4期165-175,共11页Journal of Vibration and Shock

基　　金：国家重点研发计划(2022YFB2503505);南昌市重大科技攻关项目(洪科字[2023]137号)。

摘　　要：针对某运动型多用途车开启空调所引发的怠速振动问题,进行了激励源及路径分析与优化。通过频谱分析和部件独立运行法识别出问题主要贡献频率和激励源。利用齐次坐标变换建立风扇转子不平衡计算模型,阐明了制造参数与装配位置对不平衡激励的传递原理,并基于Monte Carlo法计算了转子不平衡的统计分布;通过模态试验与冷却模块衬套振动模型仿真计算,分析出冷却模块共振是路径放大的主要原因。应用风扇转子不平衡贡献量分析方法识别了关键影响因子,指导了转子不平衡优化;基于遗传算法优化了冷却模块衬套刚度,实现冷却模块模态频率分离。优化方案验证结果表明:降低转子不平衡与冷却模块模态频率分离的组合方案显著改善了怠速振动问题。The idle vibration problem was analyzed and optimized in this paper for the air conditioning compressor operating.The major contributing frequency and excitation source of the vibration problem were identified by spectrum analysis and the component⁃independent operation method.The fan rotor unbalance calculation model was established by homogeneous coordinate transforms method.The transfer principle of manufacturing parameters and assembly position to unbalanced excitation was clarified.Statistical distribution of rotor unbalance was calculated by Monte Carlo method.Modal tests and cooling module bushing vibration model simulation calculations show that the cooling module system resonance is the main cause of path transfer.The contribution analysis method of fan rotor imbalance was applied to identify the key factors affecting and optimize the rotor unbalance.The cooling module bushing stiffness was optimized based on genetic algorithm to achieve the modal frequency separation.The validation results of the optimization scheme show that the combination solution of reducing rotor unbalance and cooling module modal frequency separation significantly improves the idle vibration.

关 键 词：怠速振动 风扇转子 不平衡 冷却模块衬套 频率分离 

分 类 号：TH113[机械工程—机械设计及理论] U461[机械工程—车辆工程]