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- Title
APPLICATION OF THE CRAIG-BAMPTON MODEL ORDER REDUCTION METHOD TO A COMPOSITE STRUCTURE: MAC AND XOR.
- Authors
Fuentes, Humberto Peredo; Zehn, Manfred
- Abstract
The Craig-Bampton model order reduction (CBMOR) method based on the Rayleigh-Ritz approach is applied to dynamic behavior simulation of a composite structure in order to verify the method's feasibility and accuracy. The principle of this method is to represent a coupled component model based on the mass, damping and stiffness matrices. The methodology consists of a finite element model based on the classical laminate theory (CLT), a design of experiment to improve the modal assurance criteria (MAC) and experimental results in order to validate the reduced model based on CBMOR method and substructures (super-elements). Experimental modal analysis has been performed using a scanner laser Doppler vibrometer (SLDV) in order to assess the quality of the finite element models. The MAC and cross orthogonality MAC (XOR) values are computed to verify the eigenfrequencies and eigenvectors. This approach demonstrates the feasibility of using CBMOR for composite structures. The example is prepared and solved with MSC/NASTRAN SOL103. The design of experiments (DOE) method has been applied in order to identify the critical parameters and thus obtain high MAC values.
- Subjects
RAYLEIGH-Ritz method; COMPOSITE structures; STIFFNESS (Engineering); MATRICES (Mathematics); FINITE element method; COMPOSITE materials; CEMENT composites
- Publication
Facta Universitatis, Series: Mechanical Engineering, 2014, Vol 12, Issue 1, p37
- ISSN
0354-2025
- Publication type
Article