摘要
基于1/4车辆模型国际平整度指数的理论推导,通过分析了考虑粘性阻尼的两自由度车辆强迫振动模型的振动特性,得到简谐激振力下国际平整度指数的数学解析式.通过分析典型路面波长国际平整度指数与行驶车速的关系图,发现国际平整度指数与速度之间不是单调增长关系,除路面因素外,两者之间的变化趋势主要受车辆系统自振频率的影响.
Based on theoretical analyses of the quarter car model of IRI （international roughness index）, the character of the two-degree vibration model with viscous damper of the quarter car was analyzed and the analysis equation of IRI under simple harmonic exciting force was obtained. With the analyses of the relationship figure between IRI and velocity of representative road profile wavelength, the change trend between IRI and vehicle velocity wasn＇t monotone increasing and was mainly affected by free vibration frequency of vehicle system.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第10期1323-1327,共5页
Journal of Tongji University:Natural Science
基金
国家杰出青年科学基金资助项目(50325825)
关键词
国际平整度指数
行驶车速
1/4车辆模型
系统自振频率
international roughness index
vehicle velocity
quarter car model
system free vibration frequency
