Journal
MATHEMATICAL AND COMPUTER MODELLING
Volume 53, Issue 9-10, Pages 1798-1809Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.mcm.2010.12.058
Keywords
Structural damage detection; Natural frequency; Finite element analysis; Modified genetic algorithm; Efficient correlation-based index
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Funding
- Islamic Azad University, Neyshabur Branch
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An efficient optimization procedure is proposed to detect multiple damage in structural systems. Natural frequency changes of a structure are considered as a criterion for damage presence. In order to evaluate the required natural frequencies, a finite element analysis (FEA) is utilized. A modified genetic algorithm (MGA) with two new operators (health and simulator operators) is presented to accurately detect the locations and extent of the eventual damage. An efficient correlation-based index (ECBI) as the objective function for the optimization algorithm is also introduced. The numerical results of two benchmark examples considering the measurement noise demonstrate the computational advantages of the proposed method to precisely determine the sites and the extent of multiple structural damage. (C) 2011 Elsevier Ltd. All rights reserved.
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