System Identification of Partially Restrained Composite Plates Using Measured Natural Frequencies
Publication: Journal of Engineering Mechanics
Volume 132, Issue 8
Abstract
A nondestructive evaluation technique established on the basis of a global minimization method is presented for the system identification of laminated composite plates partially restrained by elastic edge supports. Six natural frequencies extracted from the vibration data of the flexibly restrained plate are used to identify the system parameters of the plate. In the identification process, the trial system parameters are used in the Rayleigh–Ritz method to predict the theoretical natural frequencies of the plate, an error function is established to measure the sum of the differences between the experimental and theoretical predictions of the natural frequencies, and the global minimization method is used to search for the best estimates of the parameters by making the error function a global minimum. The accuracy and efficiency of the proposed technique in identifying the parameters of several flexibly supported plates made of different composite materials are studied via both theoretical and experimental approaches. The excellent results obtained in this study have validated the applicability of the proposed technique.
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Acknowledgment
This research work was supported by the National Science Council of the Republic of China under Grant No. UNSPECIFIEDNSC 93-2218-E-009-014. Their support is gratefully appreciated.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 132 • Issue 8 • August 2006
Pages: 841 - 850
Copyright
© 2006 ASCE.
History
Received: Mar 21, 2005
Accepted: Nov 14, 2005
Published online: Aug 1, 2006
Published in print: Aug 2006
Notes
Note. Associate Editor: Raimondo Betti
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