机场刚性道面的位移响应与结构优化分析

Dynamic response of a rigid pavement under random loads

为保证机场跑道使用安全及延长其使用寿命,研究分析飞机随机荷载作用下道面的响应规律是必要的。根据相关起落架参数及形态设置,建立飞机与道面结构相互作用模型,依照弹性层状理论体系内容,分析列出平衡振动方程,使用有限元软件建立二者耦合模型并运算分析,得出在飞机随机荷载作用下道面动位移变化规律以及不同道面结构参数对位移幅值影响变化规律。经过计算发现:改变刚性道面的面层厚度和土基模量能够对道面动位移幅值变化产生较大影响,可以为机场实际工程提供借鉴。

In order to ensure the safety of airport runway and prolong its service life,it is necessary to study the response law of airport rigid pavement.According to the relevant landing gear parameters and configuration settings,the aircraft pavement structure coupling model is established,and the equilibrium vibration equation is derived.According to the elastic layered theory system,the finite element model is established and the calculation and analysis are carried out.The dynamic displacement variation law of the pavement under the aircraft random load and the influence of different pavement structural parameters on the displacement amplitude are obtained.Through calculation,it is found that the thickness of the rigid pavement and the modulus of soil foundation have obvious influence on the dynamic displacement amplitude of the pavement,which can provide some reference for the actual engineering of the airport.