Asynchronous variational Lie group integration for geometrically exact beam dynamics

Demoures F, Gay-Balmaz F, Leitz T, Leyendecker S, Ober-Blöbaum S, Ratiu TS (2013)

Publication Type: Conference contribution, Conference Contribution

Publication year: 2013

Edited Volumes: Proceedings of the ECCOMAS Thematic Conference on Multibody Dynamics 2013

Pages Range: DVD, 10 Seiten

Conference Proceedings Title: Proceedings of the ECCOMAS Thematic Conference on Mutlibody Dynamics

Event location: Zagreb HR

Abstract

For the elastodynamic simulation of a spatially discretized beam, asynchronous variational integrators (AVI) offer the possibility to use different time steps for every element [1]. They are symplectic and conserve discrete momentum maps and since the presented integrator for geometrically exact beam dynamics [2] is derived in the Lie group setting (SO(3) for the representation of rotational degrees of freedom), it intrinsically preserves the group structure without the need for constraints [3]. A decrease of computational cost is to be expected in situations, where the time steps have to be very low in certain parts of the beam but not everywhere, e.g. if some regions of the beam are moving faster than others. The implementation allows synchronous as well as asynchronous time stepping and shows very good energy behaviour, i.e. there is no drift of the total energy for conservative systems.

Authors with CRIS profile

Thomas Leitz Institute of Applied Dynamics Sigrid Leyendecker Institute of Applied Dynamics

Related research project(s)

Space time discretization for flexible multibody systems and multisymplectic variational integrators Oct. 1, 2011 - Sept. 30, 2018

Involved external institutions

National Center for Scientific Research / Centre national de la recherche scientifique (CNRS) FR France (FR) Universität Paderborn DE Germany (DE) École Polytechnique Fédérale de Lausanne (EPFL) CH Switzerland (CH)

How to cite

APA:

Demoures, F., Gay-Balmaz, F., Leitz, T., Leyendecker, S., Ober-Blöbaum, S., & Ratiu, T.S. (2013). Asynchronous variational Lie group integration for geometrically exact beam dynamics. In Proceedings of the ECCOMAS Thematic Conference on Mutlibody Dynamics (pp. DVD, 10 Seiten). Zagreb, HR.

MLA:

Demoures, Francois, et al. "Asynchronous variational Lie group integration for geometrically exact beam dynamics." Proceedings of the ECCOMAS Thematic Conference on Mutlibody Dynamics, Zagreb 2013. DVD, 10 Seiten.

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