基于车体刚体与弹性合成的重型汽车平顺性分析  

Ride comfort analysis of heavy-duty automobile based on a rigid-elastic synthesis model of vehicle body

作　　者：李杰[1] 王文竹[1] 赵旗[1] 

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130025

出　　处：《振动与冲击》2015年第9期60-64,共5页Journal of Vibration and Shock

基　　金：国家"863"高科技资助项目(2006AA110104)

摘　　要：为了研究重型汽车的平顺性问题,运用两端自由等截面弹性梁理论,建立了车体刚体与弹性合成的4自由度1/2重型汽车振动模型。应用频域分析方法推导了基于前轮的系统频率响应特性和响应量的频率响应特性,确定了响应量的功率谱密度和均方根值。基于车体刚体与弹性合成模型和刚性模型,采用Matlab开发了相应的重型汽车平顺性仿真程序。通过与刚体模型的平顺性仿真结果对比表明:车体的弹性对重型汽车的平顺性影响很大,在重型汽车的平顺性研究中不能忽略。In order to study the ride comfort of heavy-duty automobile,a 4 DOF vibration model of the half heavyduty automobile based on the rigid-elastic synthesis of vehicle body was established by using the elastic theory of beams of equal cross sections with both free ends. Frequency response characteristics of the system and response variables based on the front wheel part were derived by the analysis method in frequency domain. The power spectral density and the root mean square value of response variables were determined. The corresponding simulation programs for the ride comfort of heavy-duty automobile were developed based on the rigid-elastic synthesis model and the rigid model of vehicle body with Matlab. By comparing the simulation results of both models,it is shown that vehicle body flexibility has a great impact on ride comfort of heavy-duty automobile and it cannot be ignored in ride comfort dosign of heavy-duty automobile.

关 键 词：车辆工程 重型汽车 平顺性 弹性梁 

分 类 号：U461.4[机械工程—车辆工程]