Optimal component mode synthesis for medium frequency problem |
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Authors: | Mathieu Herran Daniel Nélias Alain Combescure Hervé Chalons |
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Affiliation: | 1. Turbomeca, F‐64511 Bordes Cedex, France;2. Universite de Lyon, CNRS, Insa‐Lyon, LaMCoS UMR 5259, F‐69621 Villeurbanne, France |
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Abstract: | The component mode synthesis (CMS) with fixed interface (denoted Craig–Bampton) method uses a combination of static and dynamic modes. The usual definition of this CMS leads to a coupling between static and dynamic modes which are not orthogonal with respect to the stiffness matrix. This type of basis is not well suited for dynamic explicit computations, because the resulting mass matrix is not diagonal. If one keeps the same basis mode set but uses an orthogonalization process with respect to the mass matrix, the quality of the reduced Craig–Bampton system is kept but the basis vectors are combined differently. The aim of this paper is to propose a new way to control the accuracy of the reduced dynamic system for a specific frequency domain. Thus a new CMS is defined in order to be accurate in the medium frequency range. Copyright © 2010 John Wiley & Sons, Ltd. |
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Keywords: | component mode synthesis dynamic substructuring Craig– Bampton method super‐element impedance central difference integration medium frequency range |
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