弹性半空间体在移动集中荷载作用下的稳态响应

作为研究交通荷载引起的环境振动问题的基础,研究了移动集中荷载作用下弹性半空间体的稳态响应问题。通过Fourier积分变换法求得了响应的积分形式解,并在此基础上进行了响应的数值计算分析,不仅得到了弹性半空间体内部质点的响应,还得到了其表面位移。通过具体算例,对荷载移动速度、观测点深度、观测点距离等参数的影响效果进行了细致的分析。

Steady-state response of an elastic half-space under a moving point load

By means of Fourier integral transform, the steady-state response in i ntegral form of an elastic half-space subjected to a moving point load was obta i ned. A procedure was then proposed to calculate the integrals for subsonic load velocity. Not only the interior response but also the surface displacements coul d be calculated by this procedure. The effects of load velocity,depth and distance of observation point etc. on the response of the elastic half-space w ere discusse d in detail. The parametric studies conducted here give an insight int o the mechanism of wave propagation in an elastic half-space under moving load s.