Arbitrarily Wide-Angle Wave Equation Absorbing Boundary Condition in Acoustic Numerical Simulation
详细信息
- 责任者：Zhang Hongjing (State Key Laboratory of Petroleum Resource and Prospecting ; China University of Petroleum ; Beijing 102249 ; China) ; Zhou Hui
- 刊名：Oil Geophysical Prospecting
- 出版年：2013
- 卷期：48(4)
- 关键词：弹性波 ; elastic waves ; 数值模拟 ; numerical simulation ; 波动方程 ; wave equation
- 页码：p.576-582
- 图表：7 illus., 22 refs.
- 分类号：1600
- issnNo：ISSN1000-7210
- isbnNo：CN13-1095/TE
摘要
To attenuate artificial edge reflections arising at truncation boundary,stable and effective absorbing boundary conditions(ABC) should be applied in seismic numerical simulation.In this paper,we use a high accurate one-way wave equation,named arbitrarily wide-angle wave equation(AWWE),as ABC in second-order acoustic wave equation simulation.We give out the corresponding discrete formulation of the boundary condition using the finite-difference method.Meanwhile,the corner regions are carefully treated.The numerical simulations of a homogeneous medium and 2D Marmousi model show that AWWE boundary condition can adapt to a wide range of incident angle and has a better absorption effect than second-order paraxial approximations(CE2 in short).The computation efficiency of the AWWE boundary condition is almostidentical to CE2.In addition,such an ABC has noinfluence to the interior stability.
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