000015566 001__ 15566
000015566 005__ 20161115135323.0
000015566 04107 $$aeng
000015566 046__ $$k2013-06-12
000015566 100__ $$aBrun, M.
000015566 24500 $$aExternal Coupling of FE Codes for Structural Dynamics

000015566 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015566 260__ $$bNational Technical University of Athens, 2013
000015566 506__ $$arestricted
000015566 520__ $$2eng$$aTwo external coupling software, whose purpose is enabling to conduct multi-time step explicit/implicit co-computations for structural dynamics problems, are set up. They are based on the coupling algorithms proposed by Gravouil and Combescure (GC method) and Prakash and Hjelmstad (PH method). The salient features of the multi-time step partitioning methods are presented: they involve non-overlapping partitions, follow a dual Schur approach by ensuring the velocity continuity at the interface with Lagrange multipliers. The main difference between the two methods lies in the time scale at which the interface problem is solved: micro time scale for the GC-algorithm and macro time scale for the PH-algorithm. During the multi-time step co-computations involving two Finite Element codes (explicit and implicit FE codes), the tasks carried out by the coupling software PH-CPL, based on a variant of the PH algorithm, are illustrated and compared to the coupling software GC-CPL based on the GC-algorithm. The advantage of the new coupling software PH-CPL is highlighted in terms of parallel capabilities. In addition, the coupling software PH-CPL alleviates the dissipative drawback of the GC method at the interface between the subdomains. Academic cases are investigated to check the accuracy order for the GC and PH algorithms. Finally, explicit/implicit multi-time step co-computations with GC-CPL and PH-CPL software are conducted under the assumption of linear elastic material for a reinforced concrete frame structure under blast loading striking its front face.

000015566 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015566 653__ $$aSubdomain decomposition, Structural Dynamics, Coupling software, multi-time step explicit/implicit co-computations.

000015566 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015566 720__ $$aBrun, M.$$iGravouil, A.$$iCombescure, A.$$iLimam, A.
000015566 8560_ $$ffischerc@itam.cas.cz
000015566 8564_ $$s557200$$uhttps://invenio.itam.cas.cz/record/15566/files/1079.pdf$$yOriginal version of the author's contribution as presented on CD, section: CD-MS 12 ADVANCES IN NUMERICAL METHODS FOR LINEAR AND NON-LINEAR DYNAMICS
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000015566 962__ $$r15525
000015566 980__ $$aPAPER