HR: 09:30h
AN: S41B-07 INVITED     [Abstracts]
TI: Model Order Reduction for Wave Propagation
AU: * Pereyra, V L
EM: vpereyra@yahoo.com
AF: Weidlinger Associates Inc, 399 W. El Camino Real #200, Mountain View, CA 94040, United States
AB: Large-scale 3-dimensional elastic wave propagation simulations are still very demanding, even with modern parallel computing, as witnessed by recent simulations of an earthquake in the Los Angeles Basin (Terashake). Thus, our ability to run many such simulations with sources in different positions to predict the effect of possible earthquakes or for tomographic imaging is very limited. Model order reduction is a technique to extract natural modes from a limited number of simulations of a dynamical system and use them to obtain a much smaller dimensional system that still retains enough accuracy. The technique has been employed successfully in many different applications but little has been done for wave propagation problems. We present some preliminary results by using the Proper Orthogonal Decomposition (SVD) on a set of snapshots of some high fidelity calculations.
DE: 0902 Computational methods: seismic
DE: 0935 Seismic methods (3025, 7294)
SC: Seismology [S]
MN: 2007 Joint Assembly