Seismic wavefield simulation by a modified finite element method with a perfectly matched layer absorbing boundary
文献类型：期刊论文
| 作者 | Meng, Weijuan1,2; Fu, Li-Yun1 |
| 刊名 | JOURNAL OF GEOPHYSICS AND ENGINEERING
 |
| 出版日期 | 2017-08-01 |
| 卷号 | 14期号:4页码:852-864 |
| ISSN号 | 1742-2132 |
| 关键词 | numerical simulation finite element method storage scheme element-by-element PML absorbing boundary condition |
| DOI | 10.1088/1742-2140/aa6b31 |
| 文献子类 | Article |
| 英文摘要 | The finite element method is a very important tool for modeling seismic wave propagation in complex media, but it usually consumes a large amount of memory which significantly decreases computational efficiency when solving large-scale seismic problems. Here, a modified finite element method (MFEM) is proposed to improve efficiency. Triangular elements are employed to mesh the topography and the discontinuous interface more flexibly. In the two-dimensional case, the Jacobian matrix is obtained by using three controlling points instead of all nodes in each element with MFEM, which separates the Jacobian matrix from the stiffness matrix. The kernel matrices of the stiffness matrix rather than the global matrix are stored, and memory requirements are thus reduced significantly. Meanwhile, the element-by-element scheme is adopted to spare large sparse matrices and make the program easily parallelized. A second-order perfectly matched layer (PML) is also implemented to eliminate artificial reflections. Finally, the accuracy and efficiency of our algorithm are validated by numerical tests. |
| WOS关键词 | CONVOLUTION DIFFERENTIATOR METHOD ; HETEROGENEOUS MEDIA ; EQUATIONS ; PROPAGATION ; DISPERSION ; ACCURACY ; SCALAR ; ALGORITHM ; MATRIX |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000409163300005 |
| 资助机构 | Natural Science Foundation of China(41130418) ; National High Technology Research and Development Program (863 Program) of China(2013AA064202) ; Natural Science Foundation of China(41130418) ; National High Technology Research and Development Program (863 Program) of China(2013AA064202) ; Natural Science Foundation of China(41130418) ; National High Technology Research and Development Program (863 Program) of China(2013AA064202) ; Natural Science Foundation of China(41130418) ; National High Technology Research and Development Program (863 Program) of China(2013AA064202) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/61899]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Meng, Weijuan |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Weijuan,Fu, Li-Yun. Seismic wavefield simulation by a modified finite element method with a perfectly matched layer absorbing boundary[J]. JOURNAL OF GEOPHYSICS AND ENGINEERING,2017,14(4):852-864. |
| APA | Meng, Weijuan,&Fu, Li-Yun.(2017).Seismic wavefield simulation by a modified finite element method with a perfectly matched layer absorbing boundary.JOURNAL OF GEOPHYSICS AND ENGINEERING,14(4),852-864. |
| MLA | Meng, Weijuan,et al."Seismic wavefield simulation by a modified finite element method with a perfectly matched layer absorbing boundary".JOURNAL OF GEOPHYSICS AND ENGINEERING 14.4(2017):852-864. |
入库方式： OAI收割
来源：地质与地球物理研究所
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