| 圆弧形凹陷地形表面覆盖层对入射平面SV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SV波的影响[J].地震学报,2001,24(6):622-632. |
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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： | 1)中国天津300072天津大学土木工程系
2)University of Southern California,LosAngeles,CA90089-2531，U．S． |
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| 基金项目： | 国家自然科学基金 (598780 3 2 )资助项目 |
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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SV波散射问题的一个解析解，并利用该解分析了不同深宽比凹陷地形表面覆盖层刚度和厚度对入射SV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，也会显著增加对入射SV波的放大作用，该放大作用可达到单一凹陷地形的2.5倍以上．覆盖层刚度和厚度的变化对入射平面SV波也具有很大影响．
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| 关 键 词： | 圆弧形凹陷地形 覆盖层 平面SV波 散射 解析解 |
| 文章编号： | 0253-3782(2001)06-0622-15 |
| 修稿时间： | 2001年4月24日 |
EFFECTS OF A COVERING LAYER IN A CIRCULAR-ARC CANYON ON INCIDENT PLANE SV WAVES |
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| Vincent W.Lee.EFFECTS OF A COVERING LAYER IN A CIRCULAR-ARC CANYON ON INCIDENT PLANE SV WAVES[J].Acta Seismologica Sinica,2001,24(6):622-632. |
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| Authors: | Vincent WLee |
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| Abstract: | An analytical solution of scattering of incident plane SV 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 the covering layer on incident plane SV waves. It was shown that the covering layer in a canyon, even if it is very thin, amplifies incident plane SV waves tremendously, and the amplification can be two and half times than that for a simple canyon; the stiffness and thickness of the covering layer also have great effects on incident plane SV waves. |
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| Keywords: | circular arc canyon covering layer plane SV waves scattering analytical solution |
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