A frequency response‐based structural damage identification using model updating method. Issue 2 (14th July 2015)

• Record Type: Journal Article
• Authors: Shadan, Fariba; Khoshnoudian, Faramarz; Esfandiari, Akbar
• Is Part Of: Structural control and health monitoring. Volume 23:Issue 2(2016)
• Page Start: 286
• Page End: 302
• Publication Date: 2015-07-14
• Subjects: damage detection -- model updating -- damped FRF data -- incomplete measurement; Structural engineering -- Periodicals; Structural control (Engineering) -- Periodicals; Automatic data collection systems -- Periodicals; Detectors -- Periodicals; 624.17
• DOI: 10.1002/stc.1768
• Languages: English
• ISSNs: 1545-2255

Abstract

Summary: Structural model updating by estimation of stiffness and mass parameters via monitoring of dynamic characteristics has attracted much attention in recent decades. In this study, frequency response functions (FRF) are utilized in order to identify unknown structural parameters using a sensitivity‐based model updating approach. A sensitivity equation that diminishes adverse effects of incompleteness of FRF data is proposed for model updating. Efficiency of the proposed method and impacts of measurement errors and incompleteness of measured data are examined numerically through a truss reference example. The stiffness and mass parameters of the intact model are updated using the damped FRFs of the simulated damaged model. The results demonstrate that the proposed method is capable of precisely identifying the location and the severity of damage in all studied cases. Copyright © 2015 John Wiley & Sons, Ltd.