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Finite-difference modeling with topography using 3D viscoelastic parameter-modified free-surface condition

文献类型：期刊论文

作者Dong, Shu-Li1,2,3; Zhou, Xu-Hui1,2,3; Chen, Jing-Bo1,2,3
刊名GEOPHYSICS
出版日期2023-07-01
卷号88期号:4页码:T211-T226
ISSN号0016-8033
DOI10.1190/GEO2022-0556.1
英文摘要The free-surface boundary condition is a crucial aspect in the numerical modeling of (visco)elastic wave equations, especially when using a finite-difference (FD) method in the presence of surface topography. The parameter-modified method is a widely used approach to solve this problem. In this regard, the adaptive Poisson's ratio parameter-modified method has proven to be effective in accurately simulating seismic surface waves within the FD discretization framework. Based on the equivalent medium theory, vacuum approximation, and mathematical limit, we develop a viscoelastic parameter-modified (VPM) method for the implementation of the free-surface boundary condition in the 3D viscoelastic wave equation. Our approach modifies the viscoelastic constitutive relation and density at the free surface and provides a formulation in terms of displacement and stress. We determine that our VPM method is more general than the viscoelastic stress-image method as it includes the latter as a limit case when the Poisson's ratio equals zero. The presented free-surface method is represented implicitly within the FD grid, and we provide implementation details when ity and accuracy through numerical examples.
WOS关键词SEISMIC-WAVE PROPAGATION ; SPECTRAL ELEMENT METHOD ; GROUND-MOTION ; BOUNDARY-CONDITIONS ; SIMULATION ; HETEROGENEITIES ; SCATTERING ; ACCURACY ; VOLCANO
资助项目National Natural Science Foundation of China[42074159] ; National Natural Science Foundation of China[41874163]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者SOC EXPLORATION GEOPHYSICISTS - SEG
WOS记录号WOS:001032596400003
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/132A11/111338]  
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Chen, Jing-Bo
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Dong, Shu-Li,Zhou, Xu-Hui,Chen, Jing-Bo. Finite-difference modeling with topography using 3D viscoelastic parameter-modified free-surface condition[J]. GEOPHYSICS,2023,88(4):T211-T226.
APA Dong, Shu-Li,Zhou, Xu-Hui,&Chen, Jing-Bo.(2023).Finite-difference modeling with topography using 3D viscoelastic parameter-modified free-surface condition.GEOPHYSICS,88(4),T211-T226.
MLA Dong, Shu-Li,et al."Finite-difference modeling with topography using 3D viscoelastic parameter-modified free-surface condition".GEOPHYSICS 88.4(2023):T211-T226.

入库方式： OAI收割

来源：地质与地球物理研究所

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