Title: System identification of partially restrained composite plates using measured natural frequencies
Authors: Lee, C. R.
Kam, T. Y.
機械工程學系
Department of Mechanical Engineering
Keywords: composite materials;plates;laminates;parameters;natural frequency
Issue Date: 1-Aug-2006
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.
URI: http://dx.doi.org/10.1061/(ASCE)0733-9399(2006)132:8(841)
http://hdl.handle.net/11536/11996
ISSN: 0733-9399
DOI: 10.1061/(ASCE)0733-9399(2006)132:8(841)
Journal: JOURNAL OF ENGINEERING MECHANICS-ASCE
Volume: 132
Issue: 8
Begin Page: 841
End Page: 850
Appears in Collections:Articles


Files in This Item:

  1. 000239075600006.pdf