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  2. 地质与地球物理研究所
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  4. 深部资源勘探装备研发
Direct implementation of discontinuous-grid finite-difference method using multiple point sources method and dynamic wavefield injection

文献类型：期刊论文

作者Miao, Zhongzheng1,2,3,4; Zhang, Jinhai1,2,3
刊名GEOPHYSICAL JOURNAL INTERNATIONAL
出版日期2023-04-27
卷号234期号:3页码:2292-2306
关键词Numerical modelling Computational seismology Wave propagation
ISSN号0956-540X
DOI10.1093/gji/ggad234
英文摘要The classical finite-difference (FD) method stimulates wave propagation in uniform grids. In models with considerable velocity variations, the computational efficiency is compromised by oversampling in time and space. Although adopting a discontinuous grid in different wave-speed regions can improve computational efficiency, such a technique is typically hindered by low accuracy in transition zones (i.e. in the vicinity of the discontinuous-grid interface) and is typically unstable in the long term. We propose a direct implementation of the discontinuous-grid FD method by performing two simulations simultaneously: one on a coarse grid and the other on a fine grid. The proposed method applies a dynamic injection strategy to manage wavefield communication between coarse and fine submodels. Compared with previous discontinuous-grid FD methods, where the number of layers required for wavefield communication is one-half that the order of the FD scheme, the proposed method only requires one single layer, which significantly reduces the communication overhead and suppresses wavefield errors. Numerical experiments show that the results yielded by our method are consistent with the reference solutions yielded by the uniform-grid FD method via a fine grid. Furthermore, our method does not encounter numerical instability in long-term simulations. Therefore, the proposed discontinuous-grid FD method can accelerate numerical simulations while retaining stable numerical accuracy, even for long-term simulations.
WOS关键词HETEROGENEOUS MEDIA ; SEISMIC MOTION ; RECONSTRUCTION ; PROPAGATION ; EQUATIONS ; INTERPOLATION ; REFINEMENT ; INVERSION ; SCHEME
资助项目National Key Ramp;D Program of the Ministry of Science and Technology of China[2020YFA0713400] ; Key Research Program of the Chinese Academy of Sciences[ZDBS-SSW-TLC001] ; Key Research Program of the Institute of Geology amp; Geophysics, CAS[IGGCAS-202203]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:001018327200001
出版者OXFORD UNIV PRESS
资助机构National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; National Key Ramp;D Program of the Ministry of Science and Technology of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS ; Key Research Program of the Institute of Geology amp; Geophysics, CAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/111265]  
专题地质与地球物理研究所_深部资源勘探装备研发
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Zhang, Jinhai
作者单位1.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Engn Lab Deep Resources Equipment & Technol, Beijing 100029, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Miao, Zhongzheng,Zhang, Jinhai. Direct implementation of discontinuous-grid finite-difference method using multiple point sources method and dynamic wavefield injection[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2023,234(3):2292-2306.
APA Miao, Zhongzheng,&Zhang, Jinhai.(2023).Direct implementation of discontinuous-grid finite-difference method using multiple point sources method and dynamic wavefield injection.GEOPHYSICAL JOURNAL INTERNATIONAL,234(3),2292-2306.
MLA Miao, Zhongzheng,et al."Direct implementation of discontinuous-grid finite-difference method using multiple point sources method and dynamic wavefield injection".GEOPHYSICAL JOURNAL INTERNATIONAL 234.3(2023):2292-2306.

入库方式： OAI收割

来源：地质与地球物理研究所

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