基于逆虚拟激励法的整车平顺性  

Study on the Vehicle Ride Comfort Based on Inverse Pseudo Excitation Method

作　　者：张丽萍[1] 郭立新[1] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2012年第5期719-722,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(50875041);教育部新世纪优秀人才支持计划项目(NCEF08-0103)

摘　　要：建立了8自由度整车的系统模型和数学模型,使用逆虚拟激励法在路面激励谱密度未知和车轮的垂直振动响应谱密度已知的情况下,计算出了整车车辆的车身垂直加速度功率谱密度、悬架动挠度和车轮相对动载.并用MATLAB语言编制了仿真程序,对确定路面上和未知路面上的平顺性分析结果进行了比较,结果表明在未知路面上采用逆虚拟激励法研究车辆的平顺性是可行的.该方法简单易懂,避免了构建路面激励的难题,在汽车振动领域值得推广.A 8 DOF vehicle model was built,and the inverse pseudo excitation method was used to work out the PSD of vehicle body vertical acceleration,the suspension dynamic deflection and the wheel relative dynamic load in the context of unknown spectral density of road excitation and known vertical vibration response-PSD of the wheel.A simulation program is designed using MATLAB to compare the ride comfort of the sure pavement with that of the unkown one.The results show that the method presented in this work is simple and practicable,which can solve the problem of settimg the road excitations and is worth of application in automobile vibration study.

关 键 词：逆虚拟激励法 8自由度车辆振动模型 平顺性 路面激励 

分 类 号：U461.4[机械工程—车辆工程]