| 圆弧形凹陷地形表面覆盖层对入射平面P波的影响 |
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| 引用本文： | 梁建文, 严林隽, Vincent W Lee. 圆弧形凹陷地形表面覆盖层对入射平面P波的影响[J]. 固体力学学报, 2002, 23(4): 397-411. doi: 10.3969/j.issn.0254-7805.2002.04.004 |
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| 作者姓名： | 梁建文 严林隽 Vincent W Lee |
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| 作者单位： | 天津大学土木工程系,天津,300072;Department of Civil Engineering, University of Southern California, Los Angeles, CA 90089 |
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| 基金项目： | 国家自然科学基金 (5 98780 32 )资助 |
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| 摘 要： | 利用Fourier-Bessel级数展开法给出了表面具有覆盖层的圆弧形凹陷地形对入射平面P波散射问题的一个解析解,并利用该解分析了不同形状凹陷地形表面覆盖层刚度和厚度对入射P波的影响. 结果表明,凹陷地形表面覆盖层的存在,即使厚度很薄,对入射P波的散射也具有很大影响,覆盖层刚度和厚度的变化可显著改变凹陷地形场地的动力特性.
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| 关 键 词： | 圆弧形凹陷地形 覆盖层 平面P波 散射 解析解 |
| 修稿时间： | 2001-01-10 |
SCATTERING OF INCIDENT PLANE P WAVES BY A CIRCULAR-ARC CANYON WITH A COVERING LAYER |
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| SCATTERING OF INCIDENT PLANE P WAVES BY A CIRCULAR-ARC CANYON WITH A COVERING LAYER[J]. Chinese Journal of Solid Mechanics, 2002, 23(4): 397-411. doi: 10.3969/j.issn.0254-7805.2002.04.004 |
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| Authors: | Vincent W Lee |
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| Abstract: | An analytical solution for scattering of incident plane P waves by a circular-arc canyon with a covering layer was derived by Fourier-Bessel series expansion technique, and the solution was utilized to analyze the effects of stiffness and thickness of the covering layer with various depth-to-width ratios on the scattering of incident plane P waves. It is shown that existence of a covering layer on a canyon, even if it is very thin, has great effect on incident plane P waves, and variation of stiffness and thickness of the covering layer can remarkably change the dynamic behavior of the canyon. |
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| Keywords: | circular-arc canyons covering layer plane P waves scattering analytical solution |
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