%0 Conference Paper
%F Oral
%T A Coupled 2D Finite-Elements - Finite-Difference Method for Seismic Wave Propagation: Case of a Semi-Circular Canyon
%+ Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)
%A Ducellier, Ariane
%A Aochi, Hideo
%< avec comité de lecture
%B 9th International Conference on Mathematical and Numerical Aspects of Waves Propagation - Waves 09
%C Pau, France
%8 2009-06-15
%D 2009
%K seismic wave propagation
%K finite difference
%K finite elements
%Z Sciences of the Universe [physics]/Earth SciencesConference papers
%X We present a coupled method to simulate elastic wave propagation when taking into account the topography of a free surface. This method combines a finite-elements method (FEM) and a 4th-order velocity-stress staggered-grid finite-difference method (FDM). The aim of this combination of two numerical methods is to keep the advantages of both methods. The FEM is used to model the topography where the FDM cannot accurately model it. To couple the two methods, a finite-width interface (5 finite-difference grid spacing) is prepared, where a high-order interpolation scheme is used. The accuracy and efficiency of the method are tested by the simulation of wave propagation in a semi-circular canyon. Then, more complex models are studied.
%G English
%2 https://brgm.hal.science/hal-00574238/document
%2 https://brgm.hal.science/hal-00574238/file/preprint.pdf
%L hal-00574238
%U https://brgm.hal.science/hal-00574238
%~ BRGM