HR: 1340h
AN: S23B-0310    [Abstracts]
TI: Numerical Simulation of Seismic Wave Propagation in Non\-Structural Grid System
AU: * Fujihara, S
EM: satoru@jamstec.go.jp
AF: ESC, JAMSTEC, 3173-25 Showa-machi, Kanazawa-ku Yokohama, Kanagawa, 236-0011 Japan
AB: This report presents a numerical simulation code developed for for seismic wave propagation in highly complex, heterogeneous structures of high resolution. The equations of motion for the 3D wave field are solved using a finite element method. Application of tetrahedral element has some merits in terms of spatial discretization. It can be very easily applied to highly complex geometry, even to that involving spherical geometry, which usually has the grid convergence problems associated with pole and center. This simplicity associated with spatial discretization enables us to include the heterogeneity of small scale and large scale, very easily, without using the sophisticated scheme like multi-grid approach. The present scheme is well suited for the simulation of broadband physical processes. Here, we present the results of benchmark analysis. The results are compared with those of analytic approach.
DE: 7200 SEISMOLOGY
DE: 7203 Body wave propagation
DE: 7212 Earthquake ground motions and engineering
SC: Seismology [S]
MN: 2004 AGU Fall Meeting