HR: 1340h
AN: S43B-1321    [Abstracts]
TI: Seismic wave injection - a general boundary condition for the Alterman and Karal hybrid approach
AU: Matyska, C
EM: cm@karel.troja.mff.cuni.cz
AF: Charles University, Faculty of Mathematics and Physics, Department of Geophysics, V Holesovickach 2, Prague, 18000, Czech Republic
AU: * Oprsal, I
EM: io@egmdpri01.dpri.kyoto-u.ac.jp
AF: Disaster Prevention Research Institute, DPRI, Kyoto University, Gokasho, Uji, Kyoto, 611- 0011, Japan
AU: Irikura, K
EM: irikura@geor.or.jp
AF: Aichi Institute of Technology, Disaster Prevention Research Center, 1247 Yachigusa, Hachikusacyo, Toyota, Aichi, 470-0392, Japan
AB: Originated by Alterman and Karal (AK) in 1968 as a domain coupling realized by method-tailored technical algorithm, the generalized hybrid approach of wave injection is described by binding two sub-volumes treated per partes by arbitrary wave-propagation methods. The generalized AK two-step procedure possibly combines the source and path effects computed by one arbitrary method, and local site effects computed by another (arbitrary) method using the first method's wave field as input. Advantage of the approach arises from the fact that the connection between the methods keeps the formal wave-injection boundary perfectly permeable for any part of the wave field and can be applied to a variety of hybrid formulations. This hybrid approach leads to more effective modelling of combined source, path, and site effects (e.g., by multiple second step computations with varying structure, using single first step input), saving computer memory and time. The main innovation of the paper is generalization of the boundary condtion acting between two complementary sub- volumes of AK hybrid wave-propagation methods.
DE: 0500 COMPUTATIONAL GEOPHYSICS (3200, 3252, 7833)
DE: 0545 Modeling (4255)
DE: 0902 Computational methods: seismic
DE: 3285 Wave propagation (0689, 2487, 4275, 4455, 6934)
DE: 7290 Computational seismology
SC: Seismology [S]
MN: 2007 Fall Meeting