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Erschienen in: Archive of Applied Mechanics 11/2018

06.08.2018 | Original

Proper orthogonal decomposition for substructures in nonlinear finite element analysis: coupling by means of tied contact

verfasst von: Lei Zhou, Jaan-Willem Simon, Stefanie Reese

Erschienen in: Archive of Applied Mechanics | Ausgabe 11/2018

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Abstract

The finite element analysis of complex structures involves a high computational effort, since the equation system to be solved includes a large number of degrees of freedom. This holds particularly in nonlinear finite element analysis. In order to reduce the numerical effort, the total system is subdivided into substructures which are analyzed separately from each other. The computing time can be further reduced, if the number of degrees of freedom of the substructures and thereby the dimension of the global equation system are decreased. In the present paper, this is achieved by projection-based model order reduction applied at the level of the substructures. The corresponding modes include internal and boundary nodes. The precomputation is carried out either directly with respect to the global system or only on one representative substructure. For the coupling, a new surface-to-surface tied contact formulation based on the penalty method is presented which couples the reduced and unreduced substructures. This is also possible for non-matching meshes. Several nonlinear numerical examples are performed which show the feasibility of the new approach.

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Metadaten
Titel
Proper orthogonal decomposition for substructures in nonlinear finite element analysis: coupling by means of tied contact
verfasst von
Lei Zhou
Jaan-Willem Simon
Stefanie Reese
Publikationsdatum
06.08.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
Archive of Applied Mechanics / Ausgabe 11/2018
Print ISSN: 0939-1533
Elektronische ISSN: 1432-0681
DOI
https://doi.org/10.1007/s00419-018-1427-1

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