摘要
作为随机过程的车辆道路不平度,通用的模拟方法是频域模型,但在对人-车-路系统进行非线性动力学分析研究时,必须获得关于道路的时域模型。本文描述了两种基于路面功率谱模型的道路时域模型重构方法,利用该方法对C级公路路面进行数值模拟,同时建立了汽车的两自由度模型,应用SIMULINK软件仿真分析了车轮的随机动载特性,结果表明分形模型与路面的实际情况接近。
Road irregularity,as a stationary stochastic process,is generally illustrated by the frequency domain.Two time domain models of the unevenness excitation from road surface to vehicles were presented in accordance with the standard road PSD.Using this method,the simulation and analysis were done on the C grade of road.Finally,by setting up a two-degree-of-freedom vehicle model,this paper analyzes the effect of vehicle roadway surface condition on the random dynamic load of the wheels.The results show that the fractal model is more accurate and closer to the real road condition.
出处
《拖拉机与农用运输车》
2010年第6期35-37,共3页
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