Algebraic Multigrid Methods for Direct Frequency Response Analyses in Solid Mechanics

Abstract

Algebraic multigrid (AMG) methods have proven to be effective for solving the linear algebraic system of equations that arise from many classes of unstructured discretized elliptic PDEs. Standard AMG methods, however, are not suitable for shifted linear systems from elliptic PDEs, such as discretized Helmholtz operators, due to the indefiniteness of the… (More)

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