| 圆弧形层状凹陷地形对平面SH波的散射 |
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| 引用本文： | 梁建文,张郁山,顾晓鲁,Vincent W Lee.圆弧形层状凹陷地形对平面SH波的散射[J].振动工程学报,2003,16(2):158-165. |
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| 作者姓名： | 梁建文 张郁山 顾晓鲁 Vincent W Lee |
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| 作者单位： | 1. 天津大学土木工程系,天津,300072
2. University of Southern California Los Angeles, CA 90089 |
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| 基金项目： | 国家自然科学基金资助项目 (编号 :5 98780 32 ) |
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| 摘 要： | 利用Fourier—Bessel级数展开法给出了圆弧形层状凹陷地形对平面SH波散射二维问题的一个解析解，分析了层状凹陷地形沉积排列顺序、软夹层刚度和厚度等因素对SH波散射的影响。结果表明，层状凹陷地形对平面SH波的散射和单一凹陷地形差别很大，凹陷地形表面松软沉积的存在，即使厚度很薄，也会大大降低凹陷地形本身对入射波的屏障作用；层状凹陷地形中沉积排列顺序、软夹层刚度和厚度的变化对散射也具有重要影响。
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| 关 键 词： | 平面SH波 散射 圆弧形层状凹陷地形 Fourier—Bessel级数展开法 解析解 沉积土层 软夹层 |
| 修稿时间： | 2001年2月2日 |
Scattering of Plane SH Waves by a Circular-Arc Layered Canyon |
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| Vincent W Lee.Scattering of Plane SH Waves by a Circular-Arc Layered Canyon[J].Journal of Vibration Engineering,2003,16(2):158-165. |
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| Authors: | Vincent W Lee |
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| Abstract: | An analytical solution for 2-D scattering of plane SH waves by a circular-arc layered canyon is derived by Fourier-Bessel expansion technique, and the effects of alluvial sequence, stiffness and thickness of the soft alluvium are discussed. It is shown that the wave scattering by a layered canyon is essentially different with that by a simple canyon, and that the existence of the alluvia, even if very thin, can greatly reduce the barrier effect of the canyon. The alluvial sequence, stiffness and thickness of the soft alluvium have important effects on the scattering. |
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| Keywords: | plane waves SH waves scattering layered analytical solution |
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