TY - GEN
T1 - Characteristic constraint modes for component mode synthesis
AU - Castanier, Matthew P.
AU - Tan, Yung Chang
AU - Pierre, Christophe
N1 - Publisher Copyright:
© 1999 by ASME
PY - 1999
Y1 - 1999
N2 - In this paper, a technique is presented for improving the efficiency of the Craig-Bampton method of Component Mode Synthesis (CMS). An eigenanalysis is performed on the partitions of the CMS mass and stiffness matrices that correspond to the so-called constraint modes. The resultant eigenvectors are referred to as "characteristic constraint modes," since they represent the characteristic motion of the interface between the component structures. By truncating the characteristic constraint modes, a CMS model with a highly-reduced number of degrees of freedom may be obtained. An example of a cantilever plate is considered. It is shown that relatively few characteristic constraint modes are needed to yield accurate approximations of the lower natural frequencies. This method also provides physical insight into the mechanisms of vibration transmission in complex structures.
AB - In this paper, a technique is presented for improving the efficiency of the Craig-Bampton method of Component Mode Synthesis (CMS). An eigenanalysis is performed on the partitions of the CMS mass and stiffness matrices that correspond to the so-called constraint modes. The resultant eigenvectors are referred to as "characteristic constraint modes," since they represent the characteristic motion of the interface between the component structures. By truncating the characteristic constraint modes, a CMS model with a highly-reduced number of degrees of freedom may be obtained. An example of a cantilever plate is considered. It is shown that relatively few characteristic constraint modes are needed to yield accurate approximations of the lower natural frequencies. This method also provides physical insight into the mechanisms of vibration transmission in complex structures.
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U2 - 10.1115/DETC99-VIB-8187
DO - 10.1115/DETC99-VIB-8187
M3 - Conference contribution
AN - SCOPUS:84881179303
T3 - Proceedings of the ASME Design Engineering Technical Conference
SP - 2311
EP - 2318
BT - 17th Biennial Conference on Mechanical Vibration and Noise
T2 - ASME 1999 Design Engineering Technical Conferences, DETC 1999
Y2 - 12 September 1999 through 16 September 1999
ER -