Wave-field simulation in VTI media with irregular free surface

doi:10.3969/j.issn.0001-5733.2011.08.014

	Wave-field simulation in VTI media with irregular free surface
	Lan Hai-Qiang 1,2; Liu Jia 1,2; Bai Zhi-Ming 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2011-08-01
卷号	54 期号:8 页码:2072-2084
关键词	Irregular Free Surface Anisotropy Curvilinear Grids Wave-field Simulation Finite-difference
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2011.08.014
文献子类	Article
英文摘要	Modeling of seismic wave propagation in anisotropic media with irregular topography is a powerful tool that may help to interpret seismic data acquired by active and passive source seismology conducted in areas of interest like mountain ranges and basins. The major challenge in this context is the numerical implementation of the free-surface boundary condition. To implement the free-surface boundary condition, we use the boundary-conforming grid and transform a rectangular grid onto a curved grid. We use a stable and explicit second-order finite difference scheme to discretize the elastic wave equations (in a curvilinear coordinate system) in heterogeneous anisotropic medium. The free-surface boundary conditions are numerically implemented by introducing a discretization that uses boundary-modified difference operators for the mixed derivatives in the governing equations. The accuracy of the proposed method is checked by comparing the numerical results obtained by the trial algorithm with the analytical solution of the Lamb's problem, for a transversely isotropic medium with a vertical symmetry axis. Efficiency tests performed by different numerical experiments illustrate clearly the influence of an irregular (non-flat) free surface on seismic wave propagation.
WOS关键词	FINITE-DIFFERENCE METHOD ; CORRECTED TRANSPORT TECHNIQUE ; SPECTRAL ELEMENT METHOD ; ANISOTROPIC MEDIA ; BOUNDARY-CONDITION ; ELASTIC-WAVES ; SEISMIC-WAVES ; LAYERED MEDIA ; QUARTER PLANE ; PROPAGATION
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000294516600014
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73662]
专题	中国科学院地质与地球物理研究所
通讯作者	Lan Hai-Qiang
作者单位	1.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lan Hai-Qiang,Liu Jia,Bai Zhi-Ming. Wave-field simulation in VTI media with irregular free surface[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2011,54(8):2072-2084.
APA	Lan Hai-Qiang,Liu Jia,&Bai Zhi-Ming.(2011).Wave-field simulation in VTI media with irregular free surface.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,54(8),2072-2084.
MLA	Lan Hai-Qiang,et al."Wave-field simulation in VTI media with irregular free surface".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 54.8(2011):2072-2084.