Prédiction par essais virtuels de l'amortissement dans les structures spatiales

Abstract : The modeling and identification of damping have become major issues in the di-mensioning of structures, especially in advanced technology industry, such as design of space launch vehicles. The challenge of this study is to propose a virtual testing strategy to predict the damping due to the joints which are present in a structure while engineering finite element codes do not give satisfactory results because they are either too slow or unable of computing dissi-pation accurately. To do that, a new computational tool, based on the LArge Time INcrement (LATIN) method in its multiscale version, is used. This study is performed in collaboration with ASTRIUM-ST and CNES and the capability of the strategy is exemplified on one of the joints of ARIANE 5 launcher. The damping which is virtually predicted is compared to the experimental results, showing a promising accuracy.
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  • HAL Id : hal-01490623, version 1

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Alain Caignot, Pierre Ladevèze, David Néron. Prédiction par essais virtuels de l'amortissement dans les structures spatiales. 8e Colloque national en calcul des structures, CSMA, May 2007, Giens, France. ⟨hal-01490623⟩

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