An application of Rayleigh quotient for crack detection in simply supported beam
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https://doi.org/10.15625/0866-7136/18182Keywords:
multiple cracked beam, Rayleigh quotient, crack identification, frequency-based methodAbstract
An explicit expression of natural frequencies through crack parameters is derived for multiple cracked beams with simply supported boundaries using the Rayleigh quotient. The obtained expression provides not only a simple tool for calculating natural frequencies of multiple cracked beams, but also allows employing the so-called crack scanning method for detecting multiple cracks in simply supported beams from measured natural frequencies. A numerical example demonstrates that the crack scanning method, in combination with the Rayleigh quotient, enables consistent identification of cracks with 1% relative depth.
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National Foundation for Science and Technology Development
Grant numbers 107.01-2018.304
