| 浅圆沉积谷地对瑞雷波的散射-高频解 |
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| 引用本文： | 梁建文,张秋红,李方杰.浅圆沉积谷地对瑞雷波的散射-高频解[J].地震学报,2006,28(2):176-182. |
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| 作者姓名： | 梁建文 张秋红 李方杰 |
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| 作者单位： | (中国天津300072天津大学土木工程系) |
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| 基金项目： | 中国科学院资助项目，教育部跨世纪优秀人才培养计划 |
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| 摘 要： | 利用波函数展开法给出了浅圆沉积谷地对瑞雷波散射的一个高频解析解，并分析了入射频率、沉积谷地宽度和深度等因素对波散射的影响. 数值结果表明，由于沉积谷地的影响， 在入射波的近端，地表位移分布变得相对复杂，但位移幅值并不大；而在入射波远端，地表位移分布相对简单，但位移幅值却相对较大，多数情况下高于沉积地表位移幅值.
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| 关 键 词： | 沉积谷地 瑞雷波 散射 高频 解析解 |
| 文章编号： | 0253-3782(2006)02-0176-07 |
| 修稿时间： | 2004年12月29 |
SCATTERING OF RAYLEIGH WAVES BY A SHALLOW CIRCULAR ALLUVIAL VALLEY: HIGH-FREQUENCY SOLUTION |
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| Liang Jianwen,Zhang Qiuhong,Li Fangjie.SCATTERING OF RAYLEIGH WAVES BY A SHALLOW CIRCULAR ALLUVIAL VALLEY: HIGH-FREQUENCY SOLUTION[J].Acta Seismologica Sinica,2006,28(2):176-182. |
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| Authors: | Liang Jianwen Zhang Qiuhong Li Fangjie |
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| Abstract: | A high-frequency analytical solution for scattering of Rayleigh waves by a shallow circular alluvial valley was derived using wave function expansion method, and the solution was utilized to analyze the effects of incident frequency, width of the valley, and depth of the valley, etc. on the wave scattering. Numerical results showed that, because of the alluvial valley, the distribution of surface displacement at the side where wave arrives becomes relatively complicated, but the displacement amplitude is not large; the distribution of the surface displacement at far side is relatively simple, but the displacement amplitude is relatively large, and in most cases the amplitude is larger than that at the alluvium. |
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| Keywords: | alluvial valley Rayleigh waves scattering high frequency analytical solution |
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