A GA Approach for Damage Localization Using Scattered Lamb Wave

Chen Ning Cai; Gang Yan

doi:10.4028/www.scientific.net/AMM.275-277.2579

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 275-277A GA Approach for Damage Localization Using...

A GA Approach for Damage Localization Using Scattered Lamb Wave

Abstract:

This paper presents a genetic algorithm (GA)-based approach for localizing damage in plate-like structure. Diagnostic Lamb wave is excited into structure before and after damage to obtain scattered wave that contain characteristic information of the damage. After the time-of-flight (ToF) of the scattered wave in each actuator-sensor path is measured by continuous wavelet transform (CWT), a GA optimization procedure is developed to adaptively identify the location of damage without knowing the material properties a priori. It is achieved by minimizing the difference between the measured and calculated ToF of the scattered Lamb wave. Experimental study for an aluminium plate is conducted to validate the proposed damage localization approach.

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Periodical:

Applied Mechanics and Materials (Volumes 275-277)

Pages:

2579-2584

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.275-277.2579

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Online since:

January 2013

Authors:

Chen Ning Cai, Gang Yan

Keywords:

Damage Localization, Genetic Algorithm (GA), Lamb Wave, Structural Health Monitoring (SHM)

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