时空相关路面不平度时域模型仿真研究  

Simulation research on time domain model of road roughness with time-space correlation

作　　者：王亚[1] 陈思忠[1] 郑凯锋[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《振动与冲击》2013年第5期70-74,共5页Journal of Vibration and Shock

基　　金：工业和信息化部资助项目(C2220061355)

摘　　要：路面不平度时域模型对现代汽车理论研究意义重要。应用谐波叠加法建立单轮路面不平度输入模型,提出两种不同轮辙路面空间相关模型,并结合同轮辙路面不平度输入时间延迟关系,将单轮模型拓展为四轮路面不平度时域模型。仿真分析显示,该两种方法建立的路面不平度模型,其功率谱与理论功率谱基本吻合,异轮辙输入相干函数符合理论规律。与其它方法相比,该模型建模效率高。It is of significance to establish the time domain model of road roughness for the theoretical research on modem vehicle. Harmony superposition method was applied to establish the road roughness model with a single wheel vehicle. Two kinds of methods were proposed to calculate the coherence of bilateral track excitation, and combining with the correlation of front and rear wheel, road roughness model with 4-wheel vehicle was built. Simulation results show that the two modeling methods are correct in theory of coherence and can be applied to simulate stochastic road roughness with a specific spectrum. Compared with other methods, proposed methods improve the efficiency of modeling.

关 键 词：路面不平度 时域模型 谐波叠加法 时空相关 

分 类 号：U416[交通运输工程—道路与铁道工程] U461[机械工程—车辆工程]