An irregular-grid perfectly matched layer absorbing boundary for seismic wave modeling
文献类型：期刊论文
| 作者 | Xu Yi; Zhang Jian-Feng |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2008-09-01 |
| 卷号 | 51期号:5页码:1520-1526 |
| 关键词 | grid method irregular grid PML method absorbing boundary conditions acoustic equations seismic wave modeling |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | The perfectly matched layer (PML) absorbing boundary condition is incorporated into the acoustic grid method, thus resulting it an irregular-grid PML method. The proposed scheme is developed using the local coordinate system based PML splitting equations and approaches Of the PML equations under a discretization of triangular grid cells. The irregular-grid PML method allows the arilficial boundaries to he constructed with arbitrary geometries only if the interested zones are enclosed. We can take a semi-circle rather than a rectangle as the artificial boundary in simulating the 2-D half-space using the proposed scheme. This results in an over 20% reduction of the nodes In the numerical discretization. By using a smoothed artificial boundary. the irregular-grid PML method can also avoid the special treatments for the corners, which lead to complex computer implementations in the conventional PML method. Owing to that the local geometrical coefficients are computed and stored in a table in advance, no extra computational costs arise when we use the irregular-grid PML method rather than the conventional PML method. The 2-D acoustic cases are considered here. |
| WOS关键词 | FINITE-DIFFERENCE METHOD ; HETEROGENEOUS MEDIA ; ELECTROMAGNETIC-WAVES ; PROPAGATION ; SIMULATION ; ABSORPTION ; EQUATIONS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000259591000026 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69696]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu Yi |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu Yi,Zhang Jian-Feng. An irregular-grid perfectly matched layer absorbing boundary for seismic wave modeling[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2008,51(5):1520-1526. |
| APA | Xu Yi,&Zhang Jian-Feng.(2008).An irregular-grid perfectly matched layer absorbing boundary for seismic wave modeling.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,51(5),1520-1526. |
| MLA | Xu Yi,et al."An irregular-grid perfectly matched layer absorbing boundary for seismic wave modeling".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 51.5(2008):1520-1526. |
入库方式： OAI收割
来源：地质与地球物理研究所
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