机场道面系统地基阻尼系数的动态测试

A DYNAMIC MEASUREMENT METHOD OF THE FOUNDATION DAMPINGFOR THE AIRCRAFT-PAVEMENT SYSTEM

首先将飞机—道面—地基动力耦合系统转化为集中参量系统，然后利用Ｌｙｓｍｅｒ简化方法消除了集中参量与激振力频率之间的相关性，导出了地基阻尼系数与地基土壤剪切波和压缩波波速之间的关系。在此基础上提出了一种机场道面系统地基阻尼系数的动态测试技术与计算方案。最后通过对两个现场的实际测试，说明了该方法具有简单方便、结果可靠的特点。

This paper presents a dynamic measurment method of the foundation damping for the aircraft-pavementsystem.Firstly,the aircraft-pavement-foundation system is transferred into a lumped parameter system.By using Lysmer'ssimplified technique,the interrelation between the lumped parameters and frequencies of exciting forces is eliminated.Therefore the foundation damping can be obtainal by measuring the velocity of P wave and S wave in the foundation.Finally,the experiment results from two spot show that the proposed metod are both feasible and reliable.