Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10752
Title: Time domain responses of a prestressed beam and prestress identification
Authors: Law, SS
Lu, ZR
Issue Date: 2005
Publisher: Academic Press
Source: Journal of sound and vibration, 2005, v. 288, no. 4-5, p. 1011-1025 How to cite?
Journal: Journal of sound and vibration 
Abstract: The time-domain response of a prestressed Euler-Bernoulli beam under external excitation is studied based on modal superposition. The prestress force is then identified in the time domain by a system identification approach and Tikhonov regularization technique is used to provide bounds to the ill-conditioned results in the identified problem. Both measured displacements and strains are used. The noise effect is improved using the orthogonal polynomial function, and cases with either sinusoidal or impulsive excitations are illustrated to give very good results from the lower three measured modes and data obtained from three measurement points. Work in this paper demonstrates the feasibility of indirectly identifying the prestress force in a beam.
URI: http://hdl.handle.net/10397/10752
ISSN: 0022-460X
EISSN: 1095-8568
DOI: 10.1016/j.jsv.2005.01.045
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