Frequency-domain elastic-wave modeling for polygonal topography using rotated average-derivative difference operators
文献类型：期刊论文
| 作者 | Li, Zheng1,2,3; Chen, Jing-Bo1,2,3; Cao, Jian2,3 |
| 刊名 | ACTA GEOPHYSICA
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 68期号:5页码:1387-1409 |
| 关键词 | Irregular topography Frequency-domain modeling Rotated coordinate system Average-derivative difference scheme |
| ISSN号 | 1895-6572 |
| DOI | 10.1007/s11600-020-00481-6 |
| 英文摘要 | Modeling of seismic wave propagation in areas with irregular topography is an important topic in the field of seismic exploration. As a popular numerical method for seismic modeling, the finite difference method is nontrivial to consider the irregular free surface. There have been extensive studies on the time-domain finite difference simulations with irregular topography; however, the frequency-domain finite difference simulation considering irregular topography is relatively less studied. The average-derivative approach is an optimal numerical simulation scheme in the frequency domain, which can produce accurate modeling results at a relatively low computational cost. Nevertheless, this approach can only deal with the modeling problems with a flat free surface. To address this issue, we design a new frequency-domain finite difference scheme by introducing the polygonal representation of topography into the average-derivative method. The irregular topography is represented by line segments with various slopes. An extension of the conventional average-derivative difference operator in the local rotated coordinate system is used for formulating the spatial derivatives aligned with the topographic line segments. As a result, new average-derivative difference schemes are obtained for irregular topography. In this way, the average-derivative optimal method is generalized to the model with irregular topography. Numerical examples show the effectiveness of the presented method. |
| WOS关键词 | FREE-BOUNDARY CONDITIONS ; SURFACE-TOPOGRAPHY ; PROPAGATION ; SIMULATION ; MEDIA |
| 资助项目 | National Natural Science Foundation of China[41874163] ; National Natural Science Foundation of China[41674132] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000570835100001 |
| 出版者 | SPRINGER INTERNATIONAL PUBLISHING AG |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98263]  |
| 专题 | 地质与地球物理研究所_中国科学院油气资源研究重点实验室 |
| 通讯作者 | Li, Zheng |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zheng,Chen, Jing-Bo,Cao, Jian. Frequency-domain elastic-wave modeling for polygonal topography using rotated average-derivative difference operators[J]. ACTA GEOPHYSICA,2020,68(5):1387-1409. |
| APA | Li, Zheng,Chen, Jing-Bo,&Cao, Jian.(2020).Frequency-domain elastic-wave modeling for polygonal topography using rotated average-derivative difference operators.ACTA GEOPHYSICA,68(5),1387-1409. |
| MLA | Li, Zheng,et al."Frequency-domain elastic-wave modeling for polygonal topography using rotated average-derivative difference operators".ACTA GEOPHYSICA 68.5(2020):1387-1409. |
入库方式： OAI收割
来源：地质与地球物理研究所
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