Stability Analysis of Discontinuous Galerkin Approximations to the Elastodynamics Problem

Paola F. Antonietti, Blanca Ayuso de Dios, Ilario Mazzieri, Alfio Quarteroni

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We consider semi-discrete discontinuous Galerkin approximations of both displacement and displacement-stress formulations of the elastodynamics problem. We prove the stability analysis in the natural energy norm and derive optimal a-priori error estimates. For the displacement-stress formulation, schemes preserving the total energy of the system are introduced and discussed. We verify our theoretical estimates on two and three dimensions test problems.
Original languageEnglish (US)
Pages (from-to)143-170
Number of pages28
JournalJournal of Scientific Computing
Issue number1
StatePublished - Nov 21 2015
Externally publishedYes

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