期刊
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
卷 46, 期 21, 页码 3771-3781出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2009.06.022
关键词
Layered porcrelastic half-space; Pile rows; Vibration isolation; Moving loads; The transmission and reflection matrix (TRM) method
类别
资金
- National Natural Science Foundation of China [50578071]
A numerical model is developed to analyse the isolation of moving-load induced vibrations using pile rows embedded in a layered porcrelastic half-space. Based on Biot's theory and the transmission and reflection matrices (TRM) method, the free wave field solution for a moving load applied on the surface of a layered porcrelastic half-space and the fundamental solution for an harmonic circular patch load are determined. Using Muki and Sternberg's method, the second kind of frequency domain Fredholm integral equations for the dynamic interaction between pile rows and the layered poroelastic half-space are derived. The time domain solution is recovered via inverse Fourier transform in order to obtain the amplitude reduction ratio and thus assess the vibration isolation efficiency of pile rows. A special case of the present model shows good agreement with an existing solution. Numerical results of this study show that the speed of moving loads has an important influence on the isolation of vibrations by pile rows: the same pile rows can achieve better isolation efficiencies for higher speed loads than for lower speed loads. Pile rows embedded in a two-layered poroelastic half-space with a softer overlying layer usually generate better vibration isolation effects than those with a stiffer overlying layer. Finally, better isolation vibration may be realized by increasing the pile length and decreasing the net spacing between neighboring piles in a pile row. (C) 2009 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据