The component mode synthesis (CMS) based on the Craig–Bampton (CB) method has two strong limitations that appear when the number of the interface degrees-of-freedom (DOFs) is large. First, the reduced-order model (ROM) obtained is overweighed by many unnecessary DOF. Second, the reduction step may become extremely time consuming. Several interface reduction (IR) techniques addressed successfully the former problem, while the latter remains open. In this paper, we tackle this latter problem through a simple IR technique based on an a-priory choice of the interface modes. An efficient representation of the interface displacement field is achieved adopting a set of orthogonal basis functions determined by the interface geometry. The proposed method is compared with other existing IR methods on a case study regarding a rotor blade of an axial compressor.
Interface Reduction in Craig–Bampton Component Mode Synthesis by Orthogonal Polynomial Series
Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received July 11, 2017; final manuscript received August 15, 2017; published online December 12, 2017. Editor: David Wisler.
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Carassale, L., and Maurici, M. (December 12, 2017). "Interface Reduction in Craig–Bampton Component Mode Synthesis by Orthogonal Polynomial Series." ASME. J. Eng. Gas Turbines Power. May 2018; 140(5): 052504. https://doi.org/10.1115/1.4038154
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