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移动荷载作用下饱和土地基中的波动特性分析
The analysis of wave characteristics in saturated half space under the moving load
投稿时间:2017-06-29  修订日期:2017-08-03
DOI:
中文关键词:  关键词:移动荷载  饱和地基  动力响应  弥散曲线  多普勒效应  
英文关键词:Key words:moving load  saturated foundation  dynamic response  dispersion curve  the Doppler Effect  
基金项目:
作者单位E-mail
孙波 中铁第四勘察设计院集团有限公司 bosun20041016@163.com 
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中文摘要:
      摘要:本文基于Biot波动方程,经过Fourier变换和逆Fourier变换后可获得波数-频率域以及时间-空间域的解析解。然后通过数值分析的手段研究了移动荷载作用下饱和多孔弹性地基中波的传播特性。重点就弥散曲线、多谱勒效应、波的成分、动力响应频率等几个特性进行了分析,发现饱和土地基由于比弹性地基多了一项流体介质,波动特性明显差异于弹性介质。
英文摘要:
      Abstract:Based on Biot’s wave’s kinetic equation, we obtain the analytical solution of saturated foundation in the wave number - frequency domain and time-space domain by Fourier transform and Fourier inversion transform. Then, the propagation characteristics of the wave in the saturated porous elastic foundation under the action of moving load were studied by means of numerical. The dispersion curve, the doppler effect, the composition and the wave frequency characteristics were analyzed. It is found that the saturated soil foundation has a more fluid medium than elastic foundation, and the fluctuation characteristic is obviously different from the elastic medium .
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