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Title: Time-variant structural parameter identification
Authors: Ding, Y
Law, SS
Issue Date: Dec-2011
Source: Dynamics for sustainable engineering : proceedings of the 14th Asia-Pacific Vibration Conference, 5-8 December 2011, Hong Kong, v. 4, p. 1699-1708
Abstract: A new method based on windowed measured dynamic response is proposed for model updating of a time-variant structural system with unknown initial structural responses. A two phase identification algorithm is presented to identify both the initial structural responses and the time-variant structural parameter in each small time interval. Tikhonov regularization method is applied for the former while a modified adaptive regularization method is proposed to identify the structural parameter. The second method takes care of the initial model errors in updating the structural parameters. A multi-storey linear shear frame structure with and without nonlinear seismic isolators subject to seismic ground motion is used for the numerical study. A normally distributed initial model error of the structure is included. The proposed time-variant parameter identification method is found capable of identifying the time-variant parameters fairly accurately even with 10% measurement noise.
Keywords: Sensitivity
Parameter identification
Adaptive regularization
Publisher: Department of Civil and Structural Engineering and Department of Mechanical Engineering, The Hong Kong Polytechnic University.
ISBN: 978-962-367-734-9
Rights: Copyright ©2011 Department of Civil and Structural Engineering and Department of Mechanical Engineering, Hong Kong Polytechnic University
Posted with permission of the publisher.
Appears in Collections:Conference Paper

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