期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 111, 期 -, 页码 678-698出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2018.04.019
关键词
Model order reduction; Component mode synthesis; Dynamic substructuring; Dual Craig-Bampton method; Nonclassically damped systems; State-space formulation; Complex modes
The original dual Craig-Bampton method for reducing and successively coupling undamped substructured systems is extended to the case of arbitrary viscous damping. The reduction is based on the equations of motion in state-space representation and uses complex free interface normal modes, residual flexibility modes, and state-space rigid body modes. To couple the substructures in state-space representation, a dual coupling procedure based on the interface forces between adjacent substructures is used, which is novel compared to other methods commonly applying primal coupling procedures in state-space representation. The very good arbitrary viscous damping of the dual Craig-Bampton approach is demonstrated on a beam structure with localized dampers. The results are compared to a classical Craig-Bampton approach for damped systems showing the potential of the proposed method. (C) 2018 Elsevier Ltd. All rights reserved.
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