Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28004
Title: Differentiating damage effects in a structural component from the time response
Authors: Lu, ZR
Law, SS
Keywords: Damage detection
Dynamics response
Sensitivity
Structural component
Time analysis
Issue Date: 2010
Publisher: Academic Press
Source: Mechanical systems and signal processing, 2010, v. 24, no. 8, p. 2914-2928 How to cite?
Journal: Mechanical systems and signal processing 
Abstract: This paper proposes an approach to differentiate the effect of local anomalies on the different load-resisting capacities of a structural component made of elastic isotropic material. The sensitivities of structural dynamic response with respect to different damage indices are derived. They are then used in a time-domain sensitivity-based algorithm for model updating using a gradient-based approach. A planar frame structure is studied in the numerical simulation. Results show that the proposed method can effectively locate and quantify the different types of damage effects, and the proposed method is insensitive to measurement noise. Laboratory verification was performed with a three-dimensional truss structure with the identified results clearly showing how much a local physical damage can change the different physical parameters that lead to the load-resisting capacities of a structural component.
URI: http://hdl.handle.net/10397/28004
ISSN: 0888-3270
EISSN: 1096-1216
DOI: 10.1016/j.ymssp.2010.04.007
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