Ideal minimal residual-based proper generalized decomposition for non-symmetric multi-field models - Application to transient elastodynamics in space-time domain
BOUCINHA, Lucas
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Mécanique Multiéchelle pour les solides [MIMESIS]
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Mécanique Multiéchelle pour les solides [MIMESIS]
GRAVOUIL, Anthony
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Institut universitaire de France [IUF]
Mécanique Multiéchelle pour les solides [MIMESIS]
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Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Institut universitaire de France [IUF]
Mécanique Multiéchelle pour les solides [MIMESIS]
BOUCINHA, Lucas
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Mécanique Multiéchelle pour les solides [MIMESIS]
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Mécanique Multiéchelle pour les solides [MIMESIS]
GRAVOUIL, Anthony
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Institut universitaire de France [IUF]
Mécanique Multiéchelle pour les solides [MIMESIS]
< Réduire
Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne] [LaMCoS]
Institut universitaire de France [IUF]
Mécanique Multiéchelle pour les solides [MIMESIS]
Langue
en
Article de revue
Ce document a été publié dans
Computer Methods in Applied Mechanics and Engineering. 2014-02-04, vol. 273, p. 56-76
Elsevier
Résumé en anglais
It is now well established that separated representations built with the help of Proper Generalized Decomposition (PGD) can drastically reduce computational costs associated with solution of a wide variety of problems. ...Lire la suite >
It is now well established that separated representations built with the help of Proper Generalized Decomposition (PGD) can drastically reduce computational costs associated with solution of a wide variety of problems. However, it is still an open question to know if separated representations can be efficiently used to approximate solutions of hyperbolic evolution problems in space-time domain. In this paper, we numerically address this issue and concentrate on transient elastodynamic models. For such models, the operator associated with the space-time problem is non-symmetric and low-rank approximations are classically computed by minimizing the space-time residual in a natural L2 sense, yet leading to non optimal approximations in usual solution norms. Therefore, a new algorithm has been recently introduced by one of the authors and allows to find a quasi-optimal low-rank approximation a priori with respect to a target norm. We presently extend this new algorithm to multi-field models. The proposed algorithm is applied to elastodynamics formulated over space-time domain with the time discontinuous Galerkin method in displacement and velocity. Numerical examples demonstrate convergence of the proposed algorithm and comparisons are made with classical a posteriori and a priori approaches.< Réduire
Mots clés en anglais
multi-field
minimal residual
elastodynamics
separation of variables
Proper Orthogonal Decomposition (POD)
Proper Generalized Decomposition (PGD)
Project ANR
Nouveau paradigme en SIMulation numérique – Décomposition en variables séparées pour la REduction A priori de Modèle - ANR-10-COSI-0006
Origine
Importé de halUnités de recherche