Abstract: The international roughness index is the normalized measurement way about roughness in the world. The hortative wave-length affected by some factor,is aestimated scope. This text will draw on the international roughness index to deduce the minimum hortative wavelength,so as to reduce the error during the model conversation and numerical calculation of roughness.

Key words: the international, the hortative wave-length, frequency

摘要： 国际平整度指数是目前世界上共用的标准化平整度测量方法．路面激励波长受一些因素的影响，通常为估计 范围．本文将从国际平整度测量方法上推知路面激励的最小波长，以减少平整度模型转化和数值计算中的误差

关键词: 国际平整度指数, 激励波长, 频率