A GFDM with PML for seismic wave equations in heterogeneous media

被引:26
作者
Benito, J. J. [1 ]
Urena, F. [2 ]
Gavete, L. [3 ]
Salete, E. [1 ]
Muelas, A. [1 ]
机构
[1] Univ Nacl Educ Distancia, Dept Construcc & Fabricac, Madrid, Spain
[2] Univ Castilla La Mancha, Dept Matemat Aplicada, E-13071 Ciudad Real, Spain
[3] Univ Politecn Madrid, Dept Matemat Aplicada Recursos Nat, E-28040 Madrid, Spain
关键词
Meshless methods; Generalized finite difference method; Moving least squares; Seismic waves; Perfectly matched layer; FINITE-DIFFERENCE;
D O I
10.1016/j.cam.2012.08.007
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
The interior of the Earth is heterogeneous with different materials and may have complex geometry. The free surface can also be uneven. Therefore, the use of a meshless method "with the possibility of using an irregular grid-point distribution" can be of interest for modelling this kind of problem. This paper shows the application of GFDM to the problem of seismic wave propagation in 2-D. To use this method in unbounded domains one must truncate the computational grid-point avoiding reflection from the edges. PML absorbing boundary condition has then been included in the numerical model proposed in this work. (C) 2012 Elsevier B.V. All rights reserved.
引用
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页码:40 / 51
页数:12
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