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A New Second Order Absorbing Boundary Layer Formulation for Anisotropic-Elastic Wavefield Simulation

摘要:The hybrid perfectly matched layer (H-PML) approach to boundary absorption, a combination of convolutional and multiaxial perfectly matched layer (C-PML and M-PML) approaches, is extended to simulate second-order displacement-stress elastic wave equations. The displacement components instead of the velocity components can be directly updated, which can further be used in elastic full waveform inversion. A general stability condition for the second-order displacement-stress elastic wave equations is also proposed. The C-PML and H-PML simulation that results in isotropic and anisotropic media are compared. H-PML is capable of absorbing boundary reflections in both isotropic and anisotropic media, but C-PML suffers severely from the boundary reflections in anisotropic media. The H-PML simulation results for both first- and second-order elastic wave equations show its efficiency in boundary reflections suppression. The computational cost comparison between C-PML and H-PML also demonstrated that H-PML needs smaller computational volumes than C-PML for suppressing the same level of boundary reflections, which is more suitably applied in anisotropic full waveform inversion to reduce the computational volume.

关键字:Hybrid perfectly matched layer Second order elastic wave equations Stability condition

ISSN号:0033-4553

卷、期、页:卷: 176 期: 4 页: 1717-1730

发表日期:2019-04-01

影响因子:1.591000

期刊分区(SCI为中科院分区):三区

收录情况:SCI(科学引文索引印刷版),ESI(基本科学指标数据库),EI(工程索引),SCIE(科学引文索引网络版)

发表期刊名称:PURE AND APPLIED GEOPHYSICS

参与作者:李军孝,Innanen, Kristopher A.

第一作者:王兵

论文类型:期刊论文

论文概要:李军孝,Innanen, Kristopher A.,王兵,A New Second Order Absorbing Boundary Layer Formulation for Anisotropic-Elastic Wavefield Simulation,PURE AND APPLIED GEOPHYSICS,2019,卷: 176 期: 4 页: 1717-1730

论文题目:A New Second Order Absorbing Boundary Layer Formulation for Anisotropic-Elastic Wavefield Simulation

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