Asymptotically Corrected Krylov Subspace Model Order Reduction of Wavefields in Travel-Time Dominated Structures

Abstract (2016)

Authors

J.T. Zimmerling Signal Processing Systems -

V.L. Druskin Schlumberger-Doll Research

R.F. Remis Signal Processing Systems -

M. Zaslavsky Schlumberger-Doll Research

Research Group

Signal Processing Systems () (TU Delft)

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Published Date

2016

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Signal Processing Systems

Abstract

In this talk we present travel time or asymptotically corrected Krylov subspace methods to efficiently compute time- and frequency-domain wavefields in inhomogeneous structures. Fields characterized by large travel times can be effectively captured, by adding travel time information to parameter dependent Rational Krylov subspaces. This method provides reduced-order models of small order,
which can be incorporated in wavefield inversion schemes. Numerical experiments will be presented that illustrate the performance of the method.