Damage identification by Lévy ant colony optimization

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This paper deals with the identification of incipient damage in structural elements by non-destructive test based on experimentally measured structural dynamical response. By applycation of the Hilbert transform to the recorded signal the so-called phase of the analytical signal is recovered and a proper functional is constructed in such a way that its global minimum gives ameasure of the damage level, meant as stiffness reduction. Minimization is achieved by applying a modified Ant Colony Optimization (ACO) for continuous variables, inspired by the ants’ forageing behavior. The modification consists in the application of a new perturbation operator, based on alpha stable Lévy distribution. Numerical application to three degrees of freedom system isproposed to show the method and test the performance.
Lingua originaleEnglish
Titolo della pubblicazione ospiteReliability and Optimization of Structural Systems
Numero di pagine8
Stato di pubblicazionePublished - 2010

All Science Journal Classification (ASJC) codes

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