Structural Engineering and Mechanics

  • 제24권6호
  • /
  • Pages.665-682
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  • 2006
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

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Nondestructive damage evaluation of a curved thin beam

  • Kim, Byeong Hwa (Research Institute of Industrial Science & Technology, Steel Structure Research Lab.) ;
  • Joo, Hwan Joong (Department of Civil Engineering, Hanyang University) ;
  • Park, Tae Hyo (Department of Civil Engineering, Hanyang University)
  • 투고 : 2004.09.09
  • 심사 : 2006.08.01
  • 발행 : 2006.12.20
⟨ 이전 논문 다음 논문 ⟩

초록

A vibration-based nondestructive damage evaluation technique for a curved thin beam is introduced. The proposed method is capable of detecting, locating, and sizing structural damage simultaneously by using a few of the lower natural frequencies and their corresponding mode shapes before and after a small damage event. The proposed approach utilizes modal flexibilities reconstructed from measured modal parameters. A rigorous system of equations governing damage and curvature of modal flexibility is derived in the context of elasticity. To solve the resulting system of governing equations, an efficient pseudo-inverse technique is introduced. The direct inspection of the resulting solutions provides the location and severity of damage in a curved thin beam. This study confirms that there is a strong linear relationship between the curvature of modal flexibility and flexural damage in the selected class of structures. Several numerical case studies are provided to justify the performance of the proposed approach. The proposed method introduces a way to avoid the singularity and mode selection problems from earlier attempts.

키워드

과제정보

연구 과제 주관 기관 : Ministry of Construction and Transportation (MOCT)

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피인용 문헌

  1. Quantitative nondestructive evaluation of thin plate structures using the complete frequency information from impact testing vol.28, pp.5, 2006, https://doi.org/10.12989/sem.2008.28.5.525
  2. A new statistical moment-based structural damage detection method vol.30, pp.4, 2006, https://doi.org/10.12989/sem.2008.30.4.445
  3. Generalization of the statistical moment-based damage detection method vol.38, pp.6, 2006, https://doi.org/10.12989/sem.2011.38.6.715
  4. A dynamic nondestructive damage detection methodology for orthotropic plate structures vol.39, pp.2, 2006, https://doi.org/10.12989/sem.2011.39.2.223