지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.75 No.4
- 발행연도
- 2020.1
- 수록면
- 415 - 424 (10page)
이용수
초록· 키워드
오류제보하기
Recently, many structural damage detection (SDD) methods have been proposed to monitor the safety of structures. As an important modal parameter, mode shape has been widely used in SDD, and the difference of vectors was adopted based on sensitivity analysis and mode shapes in the existing studies. However, amplitudes of mode shapes in different measured points are relative values. Therefore, the difference of mode shapes will be influenced by their amplitudes, and the SDD results may be inaccurate. Focus on this deficiency, a multi-strategy SDD method is proposed based on the included angle of vectors and sparse regularization in this study. Firstly, inspired by modal assurance criterion (MAC), a relationship between mode shapes and changes in damage coefficients is established based on the included angle of vectors. Then, frequencies are introduced for multi-strategy SDD by a weighted coefficient. Meanwhile, sparse regularization is applied to improve the ill-posedness of the SDD problem. As a result, a novel convex optimization problem is proposed for effective SDD. To evaluate the effectiveness of the proposed method, numerical simulations in a planar truss and experimental studies in a six-story aluminum alloy frame in laboratory are conducted. The identified results indicate that the proposed method can effectively reduce the influence of noises, and it has good ability in locating structural damages and quantifying damage degrees.
목차
등록된 정보가 없습니다.
참고문헌 (32)
참고문헌 신청
Alkayem, N. F. / 2018 / Structural damage detection using finite element model updating with evolutionary algorithms : a survey / Neural Comput. Appl 30(2):389~411
Allemang, R. J. / 2003 / The modal assurance criterion-Twenty years of use and abuse / Sound Vib 37(8):14~23
Seyed Ahdiye Bagherahmadi / 2018 / Structural damage detection using a damage probability index based on frequency response function and strain energy concept / Structural Engineering and Mechanics, An Int＇l Journal 67(4):327~336
Beck, A. / 2009 / A fast iterative shrinkage-thresholding algorithm for linear inverse problems / SIAM J. Imaging Sci 2(1):183~202
Cawley, P. / 1979 / The location of defects in structures from measurements of natural frequencies / J. Strain Anal. Eng. Des 14(2):49~57
Allemang, R. J. / 2003 / The modal assurance criterion-Twenty years of use and abuse / Sound Vib 37(8):14~23
Seyed Ahdiye Bagherahmadi / 2018 / Structural damage detection using a damage probability index based on frequency response function and strain energy concept / Structural Engineering and Mechanics, An Int＇l Journal 67(4):327~336
Beck, A. / 2009 / A fast iterative shrinkage-thresholding algorithm for linear inverse problems / SIAM J. Imaging Sci 2(1):183~202
Cawley, P. / 1979 / The location of defects in structures from measurements of natural frequencies / J. Strain Anal. Eng. Des 14(2):49~57
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