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Model Reduction Approaches for Solution of Wave Equations for Multiple Frequencies
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
We have developed a novel approach for solving multi-frequency frequency domain wave equation. The approach is based on efficient Krylov subspace approximants and projection-based model reduction techniques. We have considered polynomial Krylov and extended Krylov subspaces for approximating the solution given by stability-corrected resolvent. Our numerical examples indicate that polynomial Krylov subspace allows to obtain solution for the whole a priori given frequency range at the cost of solution for minimal frequency (for that frequency range) obtained using unpreconditioned BiCGStab solver. Extended Krylov subspace has been shown to improve the convergence by providing more uniform rate for the whole frequency range.