Structural Engineering and Mechanics

  • 제58권6호
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  • Pages.1087-1107
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  • 2016
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Multicracks identification in beams based on moving harmonic excitation

  • Chouiyakh, Hajar (Mathematical Modeling and Control, Faculty of Sciences and Techniques of Tangier, Abdelmalek Essaadi University) ;
  • Azrar, Lahcen (Mathematical Modeling and Control, Faculty of Sciences and Techniques of Tangier, Abdelmalek Essaadi University) ;
  • Alnefaie, Khaled (Department of Mechanical Engineering, Faculty of Engineering, King Abdulaziz University) ;
  • Akourri, Omar (Mathematical Modeling and Control, Faculty of Sciences and Techniques of Tangier, Abdelmalek Essaadi University)
  • 투고 : 2015.03.28
  • 심사 : 2016.04.06
  • 발행 : 2016.06.25
⟨ 이전 논문 다음 논문 ⟩

초록

A method of damage detection based on the moving harmonic excitation and continuous wavelet transforms is presented. The applied excitation is used as a moving actuator and its frequency and speed parameters can be adjusted for an amplified response. The continuous wavelet transforms, CWT, is used for cracks detection based on the resulting amplified signal. It is demonstrated that this identification procedure is largely better than the classical ones based on eigenfrequencies or on the eigenmodes wavelet transformed. For vibration responses, free and forced vibration analyses of multi-cracked beams are investigated based on both analytical and numerical methodological approaches. Cracks are modeled through rotational springs whose compliances are evaluated using linear elastic fracture mechanics. Based on the obtained forced responses, multi-cracks positions are accurately identified and the CWT identification can be highly improved by adjusting the frequency and the speed excitation parameters.

키워드

과제정보

연구 과제 주관 기관 : King Abdulaziz University

참고문헌

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피인용 문헌

  1. Vibration and multi-crack identification of Timoshenko beams under moving mass using the differential quadrature method vol.120, 2017, https://doi.org/10.1016/j.ijmecsci.2016.11.014
  2. Multi-cracks identification based on the nonlinear vibration response of beams subjected to moving harmonic load vol.83, 2016, https://doi.org/10.1051/matecconf/20168306003
  3. Crack identification based on the nonlinear response of plates with variably oriented surface crack. vol.149, pp.2261-236X, 2018, https://doi.org/10.1051/matecconf/201714902061
  4. Crack identification based on the nonlinear response of plates with variably oriented surface crack. vol.149, pp.2261-236X, 2018, https://doi.org/10.1051/matecconf/201814902061
  5. Comparisons of wavelets and contourlets for vibration-based damage identification in the plate structures pp.2048-4011, 2019, https://doi.org/10.1177/1369433218824903