2012
DOI: 10.1155/2012/567251
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Damage Identification in Bars with a Wave Propagation Approach and a Hybrid Optimization Method

Abstract: The formulation and solution of the inverse problem of damage identification based on wave propagation approach are presented. Different damage scenarios for a bar are considered. Time history responses, obtained from pulse-echo synthetic experiments, are used to identify damage position, severity and shape. In order to account for noise corrupted data, different levels of signal to noise ratio – varying from 30 to 0 dB – are introduced. In the identification process, different optimization methods are investi… Show more

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Cited by 4 publications
(7 citation statements)
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“…The structure under concern has length l = 1000 mm, nominal thickness h = 10 mm, width w = 30 mm, yielding a nominal rectangular cross-section area A = 300 mm 2 , elasticity modulus E a = 7.1 × 10 10 Pa, mass density ρ = 2.7 × 10 3 kg/m 3 and longitudinal plane wave speed c = 5128 m/s. As it is well known, such a slender bar works as a plane waveguide, as demonstrated by experimental tests in [15,23]. Therefore, the one-dimensional SAA, presented in Section 2, applies quite well.…”
Section: Damage Scenarios Addressedmentioning
confidence: 83%
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“…The structure under concern has length l = 1000 mm, nominal thickness h = 10 mm, width w = 30 mm, yielding a nominal rectangular cross-section area A = 300 mm 2 , elasticity modulus E a = 7.1 × 10 10 Pa, mass density ρ = 2.7 × 10 3 kg/m 3 and longitudinal plane wave speed c = 5128 m/s. As it is well known, such a slender bar works as a plane waveguide, as demonstrated by experimental tests in [15,23]. Therefore, the one-dimensional SAA, presented in Section 2, applies quite well.…”
Section: Damage Scenarios Addressedmentioning
confidence: 83%
“…In Section 2 a summary of the theoretical wave propagation direct model is presented. It is almost the same as presented in [23], but discussed again here for the sake of completeness. In Section 3 the adopted optimization procedures are displayed.…”
Section: Introductionmentioning
confidence: 80%
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