移动荷载作用下非局部地基梁动力响应分析的有限元法

Dynamic response of beams with nonlocal foundations subjected to moving loads using finite element method

基于非局部地基理论,推导了移动荷载作用下非局部地基梁动力响应问题的有限元解,分别讨论了地基的非局部参数、刚度、阻尼系数以及移动荷载速度对非局部地基梁动力响应的影响,并比较了非局部结果与局部结果的差异。结果表明,地基的非局部参数、刚度和阻尼是地基梁的动力响应的主要影响参数,地基梁最大响应及其发生的时刻与移动荷载速度有关。研究成果可为轨道地基系统设计提供参考。

Based on the theory of nonlocal foundations, the response of beams with nonlocal foundations subjected to moving loads is solved using finite element method. The effects of nonlocal parameter, stiffness, damp and velocity of the moving load on dynamic response are discussed,respec-tively. And the differences between nonlocal and local are compared. The results show that nonlocal parameter,stiffness and damp are the main parameters. The maximum response and the moment it occurs depends on the velocity of moving loads. The results and method can be regard as a reference for track foundation system designed.