An enhanced Craig-Bampton method

作者：Kim Jin Gyun; Lee Phill Seung^*

来源：International Journal for Numerical Methods in Engineering, 2015, 103(2): 79-93.

DOI：10.1002/nme.4880

• structural dynamics
• finite element method
• model reduction
• component mode synthesis
• Craig-Bampton method
• dynamic substructuring

In this paper, we propose a new component mode synthesis method by enhancing the Craig-Bampton (CB) method. To develop the enhanced CB method, the transformation matrix of the CB method is enhanced considering the effect of residual substructural modes and the unknown eigenvalue in the enhanced transformation matrix is approximated by using O'Callahan's approach in Guyan reduction. Using the newly defined transformation matrix, original finite element models can be more accurately approximated by reduced models. For this reason, the accuracy of the reduced models is significantly improved with a low additional computational cost. We here present the formulation details of the enhanced CB method and demonstrate its performance through several numerical examples.

• 出版日期2015-7-13