Three-dimensional simulation of track on poroelastic half-space vibrations due to a moving point load |
| |
| Authors: | Honglei Sun Yuanqiang Cai Changjie Xu |
| |
| Institution: | 1. Department of Civil Engineering, Zhejiang University, Hangzhou 310027, PR China;2. College of Architecture and Civil Engineering, Wenzhou University, Wenzhou 325035, PR China |
| |
| Abstract: | An analytical approach is used to investigate dynamic responses of a track system and the poroelastic half-space soil medium subjected to a moving point load under three-dimensional condition. The whole system is divided into two separately formulated substructures, the track sub-system and the ground. The ballast supporting rails and sleepers is placed on the surface of the ground. The rail is modeled by introducing the Green function for an infinitely long Euler beam subjected to the action of the moving point load and the reaction of sleepers represented by a continuous mass. Using the double Fourier transform, the governing equations of motion are then solved analytically in the frequency–wave-number domain. The time domain responses are evaluated by the inverse Fourier transform computation for a certain load velocities. Computed results show that dynamic responses of the soil medium are considerably affected by the fluid phase as well as the load velocity. |
| |
| Keywords: | Poroelasticity Railroad tracks Moving load Soil dynamics Fourier transform |
| 本文献已被 ScienceDirect 等数据库收录！ |
