车辆路面不平度输入的随机激励时域模型

Time Domain Model of Road Undulation Excitation to Vehicles

摘要:

作为随机过程的车辆道路不平度高程，通用的模拟方法是频域模型——道路不平度功率谱密度(PSD)。但在对人一车一路系统进行非线性或耦合动力学分析研究时，必须获得关于道路的时域模型。由等级道路的标准谱或实测道路的估计谱反求道路时域模型具有重要的理论意义和实用价值。本文基于道路PSD，描述了几种基于路面功率谱模型的道路时域模型重构方法，阐述了时域建模的原理、特点和适用范围，给出了其数学上的实现过程。最后，指出了道路时域建模进一步研究的方向。

Abstract:

Road irregularity, as a stationary stochastic process, is generally illustrated by the power spectral density (PSD) in frequency domain. Based on the frequency models, three time domain models of to the unevenness excitation to vehicles from road surfaces were presented in accordance with the standard or measured road PSD. The properties of the resulting models were theoretically discussed and mathematically realized. Finally, the further research topics were given in the paper.