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当车辆在均匀的路面上行驶时,车速的改变会引起路面的非平稳激励,由于车速的改变,适用于频域分析的方法已不再有效。现用状态空间模型来描述车辆在时域的动态特性。分别针对两种车辆悬架系统:四分之一车辆模型和二分之一车辆模型,采用数值计算来定量地分析加速和减速对路面动载的影响。改进的方法可用于研究路面结构的动态响应,对更好地进行路面结构设计和路面非破损检测与评价有很大的帮助。
When the vehicle is driving on a uniform road surface, the change of the vehicle speed will cause the non-stationary excitation of the road surface. Due to the change of the vehicle speed, the method applicable to the frequency domain analysis is no longer valid. The current state space model to describe the dynamic characteristics of vehicles in the time domain. Two kinds of vehicle suspension system, one-quarter vehicle model and one-half vehicle model, are respectively analyzed by numerical calculation to quantitatively analyze the influence of acceleration and deceleration on road surface dynamic load. The improved method can be used to study the dynamic response of pavement structure, which is very helpful to better pavement structure design and non-damage detection and evaluation of pavement.