会议专题

DIFFRACTION OF SEISMICWAVES FROM 3-D CANYONS AND ALLUVIAL BASINS MODELED USING THE FAST MULTIPOLE-ACCELERATED BEM

The analysis of seismic wave propagation and amplification in complex geological structures raises the need for efficient and accurate numerical methods. The solution of the elastodynamic equations using boundary element methods (BEMs) gives rise to fully-populated matrix equations. Earlier investigations on the elastodynamic equations have established that the Fast Multipole (FM) method reduces the complexity of a BEM solution to N logN per GMRES iteration. The present Article addresses the extension of the FM-BEM strategy to 3D multi-domain elastodynamics in the frequency domain. Using this FM-accelerated BEM it is now possible to study the propagation of seismic waves in 3-D alluvial basins at a much lower cost than with standard BEM. Validations are performed for canonical basins and comparisons to previous works are proposed. It shows the efficiency and accuracy of the fast BEM formulation proposed.

site effects boundary element method seismic wave amplification Fast Multipole Method.

S.CHAILLAT M.BONNET J.F.SEMBLAT

PhD Student,Laboratoire de Mécanique des Solides,école Polytechnique,France,& Laboratoire Central de Senior scientist,Laboratoire de Mécanique des Solides,école Polytechnique,France Senior scientist,Laboratoire Central des Ponts et Chaussées,Paris,France

国际会议

14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)

北京

英文

2008-10-12(万方平台首次上网日期,不代表论文的发表时间)