非平稳路面激励下车辆振动动力学建模与仿真  

Modeling and Dynamic Simulation of Vehicles Based on Non-stationary Road Excitation

作　　者：胡启国[1] 钱凯[1] 李力克[1] 岳光杰[1] 司红建[1] 

机构地区：[1]重庆交通大学机电与汽车工程学院,重庆400074

出　　处：《郑州大学学报（工学版）》2012年第6期49-53,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：重庆市自然科学基金计划资助项目(2008BB3353);中国石油天然气集团公司资助项目(AJ-11-16)

摘　　要：为研究非平稳路面激励下车辆振动特性,建立了非平稳路面时域模型及1/2车身的五自由度汽车振动模型.运用Margenau-Hill时频分析方法,对非平稳路面汽车前后轮激励进行时频特性分析,结果表明非平稳路面激励具有低频波动特性.最后以第二类拉格朗日法为理论基础,建立振动动力学方程,并借助MATLAB/simulink建立振动仿真模型,得出在非平稳路面激励下,分别适当减小汽车座椅悬架与后悬架刚度以及提高汽车座椅悬架与后悬架阻尼,可以提高驾驶员的乘坐舒适性.In order to research the light agricultural vehicle ride under the stimulation of the road,We established a non-stationary road excitation model and half of the vehicle which have 5-DOF vibration model.The Margenau-Hill time-frequency analysis tools was used to study the non-stationary excitation of the vehicles of the front and rear wheels roughness,and the results showed that non-stationary road stimulation have low-frequency and wave characteristics.Finally,based on the method of Lagrange,we established a dynamics equation modeling of vibration,using matlab/simulink and set up 5-DOF vibration simulation model and obtain a result,under the excitation of the road,to reduce the seat and rear suspension stiffness and to increase the seat and rear suspension damper can improve the driver＇s sense of comfort.

关 键 词：非平稳路面激励 Margenau-Hill时频分析 第二类拉格朗日法 MATLAB SIMULINK 

分 类 号：U461.3[机械工程—车辆工程]