| 饱和地基竖向振动的衰减特性 |
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| 引用本文： | 陈龙珠,陈胜立,梁发云.饱和地基竖向振动的衰减特性[J].上海交通大学学报,2002,36(3):376-381. |
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| 作者姓名： | 陈龙珠 陈胜立 梁发云 |
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| 作者单位： | 1. 上海交通大学,安全与防灾工程研究所,上海,200030
2. 清华大学,水利水电系,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目 ( 5 95 790 18) |
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| 摘 要： | 基于第一作者提出的弹性波动方程 ,研究了匀质弹性饱和地基的 Lamb问题 .考虑线源和点源两种情形 ,通过 Fourier变换和 Hankel变换 ,导出了 Lamb问题的积分形式解 .通过算例研究了该积分形式解数值实施的可行性 ,给出了地基表面竖向位移的衰减曲线 ,并由此考察了土的渗透性以及激振频率对它的影响
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| 关 键 词： | 饱和地基 Lamb问题 振动衰减 |
| 文章编号： | 1006-2467(2002)03-0376-06 |
| 修稿时间： | 2001年3月5日 |
Vibration Attenuation of Saturated Strata by Vertical Surface Loads |
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| CHEN Long zhu ,CHEN Sheng li ,LIANG Fa yun.Vibration Attenuation of Saturated Strata by Vertical Surface Loads[J].Journal of Shanghai Jiaotong University,2002,36(3):376-381. |
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| Authors: | CHEN Long zhu CHEN Sheng li LIANG Fa yun |
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| Institution: | CHEN Long zhu 1,CHEN Sheng li 2,LIANG Fa yun 1 |
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| Abstract: | Based on the basic equations of elastic waves in saturated soils established by the first author, Lamb's problem for saturated strata was studied. By means of Fourier transform and Hankel transform, the integral solutions for a line and a point harmonic excitation were derived, respectively. The vibration attenuation at ground surface was presented. And the combined effects of the soil permeability and the loading frequency on the results are shown to be rather complicated, which is similar with the single phased elastic strata only at an extremely low permeability and/or frequency. |
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| Keywords: | saturated strata Lamb's problem vibration attenuation |
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