| 地下夹塞断面形状随机性对平面SH波散射的影响 |
| |
| 引用本文： | 何颖,梁建文,林永星.地下夹塞断面形状随机性对平面SH波散射的影响[J].地震学报,2014,36(4):584-594. |
| |
| 作者姓名： | 何颖 梁建文 林永星 |
| |
| 作者单位： | 1.中国天津 300072 天津大学土木工程系 |
| |
| 基金项目： | 国家自然科学基金(51378348);天津市应用基础研究重点项目(12JCZDJC29000)共同资助 |
| |
| 摘 要： | 采用波函数展开法及边界离散的方法给出了任意断面形状的地下夹塞对平面SH波散射的半解析解; 利用蒙特卡罗方法随机模拟产生了30组夹塞断面样本， 通过对该样本在平面SH波入射下地表位移幅值的统计分析， 研究了夹塞断面形状随机性对平面SH波散射的影响. 结果表明， 夹塞断面形状随机性对平面SH波的散射具有重要影响. 以圆形夹塞为例， 当断面半径的变异系数为0.1时， 地表位移响应幅值变异系数可达0.71. 随着入射频率的升高， 变异系数逐渐增大； 随着夹塞刚度的降低， 变异系数逐渐增大； 随着夹塞埋深的增加， 变异系数逐渐减小.
|
| 关 键 词： | 地下夹塞 断面形状 平面SH波 散射 波函数展开法 半解析解 蒙特卡罗方法 |
| 收稿时间： | 2013-07-26 |
Effect of cross-section-shape randomness of underground inclusion on scattering of plane SH waves |
| |
| Affiliation: | 1.Department of Civil Engineering， Tianjin University， Tianjin 300072， China2.Tianjin Key Laboratory of Civil Engineering Structures and New Materials， Tianjin 300072， China3.Tianjin University Research Institute of Architectural Design， Tianjin 300072， China |
| |
| Abstract: | The semi-analytical solution of scattering of plane SH waves by underground inclusion with arbitrary cross-section in half-space is presented using wave functions expansion method combined with boundary discrete method. Monte Carlo method is used to randomly generate 30 samples for cross-section shape of the inclusion, and the effect of cross-section-shape randomness on scattering of plane SH waves are studied by statistical analysis of the surface displacement amplitudes. It is shown that, cross-section-shape randomness has significant effect on the scattering of SH waves around an inclusion in half-space. When the variation coefficient of inclusion radius is equal to 0.1, for an inclusion of circular shape, the variation coefficient of surface displacement amplitude may be up to 0.71. The variation coefficient increases as the incident frequency increases. The variation coefficient increases as the inclusion rigidity decreases. The variation coefficient decreases as the inclusion depth increases. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地震学报》浏览原始摘要信息 |
|
点击此处可从《地震学报》下载全文 |
