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http://hdl.handle.net/10397/6912
| 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 Time-variant Parameter identification L-curve Adaptive regularization Nonlinearity |
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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| File | Description | Size | Format | |
|---|---|---|---|---|
| Ding_Time-Variant_Structural_Parameter.pdf | 1.87 MB | Adobe PDF | View/Open |
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