机场道面地基模量K的动态识别方法

A DYNAMIC IDENTIFICATION METHOD OF THE FOUNDA TION MODULUS K FOR AIRPORT PAVEMENT

本文将机场道面系统抽象为粘弹性地基上4边自由矩形板模型,将理论计算的动挠度和实测动挠度相比较,建立了目标函数。在此基础上,利用最优化理论提出了一种机场道面系统地基模量K的动态识别方法,并进行了实例计算。

The objective of this paper is to propose a dynamic identification method of the foundation modulus K for the airport pavement system. The airport pavement system can be regarded as a rectangular plate with free edges supported on viscoelastic foundation, and a moving load is employed to simulate the actual aircraft wheel loads. By comparing the calculating displacements with the experimental displacements the objective function is established. In the procedure of optimization, the objective function is approximated by an interpolation polynomial, and the roots of its first derivative are obtained by using Newton algorithm. An example showing the efficiency of the method developed is finally presented.