A GFDM with PML for seismic wave equations in heterogeneous media

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• 作者：J.J. Benito^a ; ^{jbenito@ind.uned.es} ; F. Ureñ ; a^b ; ^{francisco.urena@uclm.es} ; L. Gavete^c ; ^{lu.gavete@upm.es} ; E. Salete^a ; ^{esalete@ind.uned.es} ; A. Muelas^a ; ^{amuelas@ind.uned.es}
• 关键词：65M06 ; 65M12 ; 74S20 ; 80M20
• 刊名：Journal of Computational and Applied Mathematics
• 出版年：2013
• 出版时间：November, 2013
• 年：2013
• 卷：252
• 期：Complete
• 页码：40-51
• 全文大小：1190 K

文摘

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.