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SIMPLIFIED MODELS FOR THE LOCATION OF CRACKS IN BEAM STRUCTURES USING MEASURED VIBRATION DATA

✍ Scribed by J.K SINHA; M.I FRISWELL; S EDWARDS

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 273 KB
Volume: 251
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.2001.3978

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✦ Synopsis

A new simpli"ed approach to modelling cracks in beams undergoing transverse vibration is presented. The modelling approach uses Euler}Bernoulli beam elements with small modi"cations to the local #exibility in the vicinity of cracks. This crack model is then used to estimate the crack locations and sizes, by minimizing the di!erence between the measured and predicted natural frequencies via model updating. The uniqueness of the approach is that the simpli"ed crack model allows the location and damage extent to be estimated directly. The simpli"ed crack model may also be used to generate training data for pattern recognition approaches to health monitoring. The proposed method has been illustrated using the experimental data on beam examples.

2002 Elsevier Science Ltd.

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