Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/13881
Title: A substructuring method for model updating and damage identification
Authors: Xia, Y 
Weng, S
Xu, YL 
Keywords: Damage identification
Large-scale structures
Modal flexibility
Model updating
Substructuring method
Issue Date: 2011
Source: Procedia engineering, 2011, v. 14, p. 3095-3103 How to cite?
Journal: Procedia Engineering 
Abstract: Model updating of large-scale structures is time-consuming as the global system matrices need to be assembled continuously and the global eigensolutions and eigensensitivities are required in each iteration, even only a few elemental parameters need updating. In this paper, a substructuring approach is proposed to extract the substructural dynamic flexibility matrices from the measured modal properties of the global structure under the constraints of force compatibility and displacement compatibility. Thereafter the focused substructure is treated as an independent structure and updated directly using the traditional model updating method. It not only reduces the size of the analytical model involved in model updating but also decreases the uncertain parameters that need updating, thus resulting in a rapid convergence of the optimization process. Moreover, if a particular substructure needs updating the measurement can be focused on the local area of the interested substructure only and the requirement of measurement on the entire structure is avoided. A laboratory tested frame structure is employed to illustrate the effectiveness and accuracy of the proposed method.
Description: 12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12, Hong Kong, 26 - 28 January 2011
URI: http://hdl.handle.net/10397/13881
ISSN: 1877-7058
DOI: 10.1016/j.proeng.2011.07.389
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