Smart Structures and Systems

  • 제4권5호
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  • Pages.583-603
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  • 2008
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  • 1738-1584(pISSN)
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  • 1738-1991(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Acceleration-based neural networks algorithm for damage detection in structures

  • Kim, Jeong-Tae (Department of Ocean Engineering, Pukyong National University) ;
  • Park, Jae-Hyung (Department of Ocean Engineering, Pukyong National University) ;
  • Koo, Ki-Young (Department of Civil & Environmental Engineering, Korea Advanced Institute of Science & Technology) ;
  • Lee, Jong-Jae (Department of Civil & Environmental Engineering, Sejong University)
  • 투고 : 2007.08.15
  • 심사 : 2008.03.03
  • 발행 : 2008.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, a real-time damage detection method using output-only acceleration signals and artificial neural networks (ANN) is developed to monitor the occurrence of damage and the location of damage in structures. A theoretical approach of an ANN algorithm that uses acceleration signals to detect changes in structural parameters in real-time is newly designed. Cross-covariance functions of two acceleration responses measured before and after damage at two different sensor locations are selected as the features representing the structural conditions. By means of the acceleration features, multiple neural networks are trained for a series of potential loading patterns and damage scenarios of the target structure for which its actual loading history and structural conditions are unknown. The feasibility of the proposed method is evaluated using a numerical beam model under the effect of model uncertainty due to the variability of impulse excitation patterns used for training neural networks. The practicality of the method is also evaluated from laboratory-model tests on free-free beams for which acceleration responses were measured for several damage cases.

키워드

참고문헌

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