A GFDM with PML for seismic wave equations in heterogeneous media

JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS

卷:252

Article

Benito, J. J.¹  Urena, F.²  Gavete, L.³  Salete, E.¹  Muelas, A.¹ 

[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;   

DOI  :  10.1016/j.cam.2012.08.007

来源: Elsevier

【 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.

【 授权许可】

Free