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Descripción
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| This paper analyzes some of the main issues to take into consideration in the dynamic simulation of complex, real-life models containing flexible bodies with small deformations. This study focuses on three main aspects. The first two are related to the definition of flexible bodies: the boundary conditions for deformable bodies, and the adequate selection of a small set of the deformation modes. For the flexible bodies, a floating frame approach combined with component mode synthesis is used. The inertial terms of this type of bodies are evaluated efficiently, irrespectively of the number of the nodes that appears in the FEM discretization, and avoiding the use of the inertial shape integrals. The third issue studied is the way of integrating efficiently the dynamic equations of motion of the multibody system. Topological semi-recursive methods are used in order to take advantage of the relatively small numbers of parameters needed. Two implicit numerical integration methods are presented. The first one is based on the Augmented Lagrangian method with penalty terms in positions. The second method uses independent coordinates and projects the dynamic equations on the constraint tangent manifold by means of a velocity transformation matrix. The impact of the flexible bodies on the simulation efficiency is studied for both methods. | |
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Internacional
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Si |
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Nombre congreso
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MULTIBODY DYNAMICS 2011, ECCOMAS Thematic Conference MULTIBODY DYNAMICS 2011, ECCOMAS Thematic Conference. J.C. Samin, P. Fisette (eds.) |
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Tipo de participación
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960 |
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Lugar del congreso
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Brussels, Belgium, 4-7 July 2011 |
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Revisores
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Si |
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ISBN o ISSN
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978-2-8052-0116-5 |
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DOI
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Fecha inicio congreso
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04/07/2011 |
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Fecha fin congreso
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07/07/2011 |
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Desde la página
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1 |
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Hasta la página
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10 |
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Título de las actas
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MULTIBODY DYNAMICS 2011, ECCOMAS Thematic Conference. J.C. Samin, P. Fisette (eds.) |