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 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.20 No.4
- 발행연도
- 2017.1
- 수록면
- 427 - 440 (14page)
이용수
초록· 키워드
오류제보하기
One of the suitable structural damage detection methods using vibrational characteristics are damage-index-based methods. In this study, a damage index for identifying damages in plate structures using frequency response function (FRF) data has been provided. One of the significant challenges of identifying the damages in plate structures is high number of degrees of freedom resulting in decreased damage identifying accuracy. On the other hand, FRF data are of high volume and this dramatically decreases the computing speed and increases the memory necessary to store the data, which makes the use of this method difficult. In this study, FRF data are compressed using two-dimensional principal component analysis (2D-PCA), and then converted into damage index vectors. The damage indices, each of which represents a specific condition of intact or damaged structures are stored in a database. After computing damage index of structure with unknown damage and using algorithm of lookup tables, the structural damage including the severity and location of the damage will be identified. In this study, damage detection accuracy using the proposed damage index in square-shaped structural plates with dimensions of 3, 7 and 10 meters and with boundary conditions of four simply supported edges (4S), three clamped edges (3C), and four clamped edges (4C) under various single and multiple-element damage scenarios have been studied. Furthermore, in order to model uncertainties of measurement, insensitivity of this method to noises in the data measured by applying values of 5, 10, 15 and 20 percent of normal Gaussian noise to FRF values is discussed.
목차
등록된 정보가 없습니다.
참고문헌 (24)
참고문헌 신청
Balageas, D. / 2006 / Structural Health Monitoring / Wiley Online Library
Chen, B. / 2007 / A new damage index for detecting sudden change of structural stiffness / Struct. Eng. Mech 26(3):315~341
Chopra, A. K. / 1995 / Dynamics of Structures / Prentice Hall
Choudhury, A. R. / 1996 / Damage detection in structures using measured frequency response function data
Esfandiari, A. / 2013 / Theoretical and experimental structural damage diagnosis method using natural frequencies through an improved sensitivity equation / Int. J. Mech. Sci. 70:79~89
Chen, B. / 2007 / A new damage index for detecting sudden change of structural stiffness / Struct. Eng. Mech 26(3):315~341
Chopra, A. K. / 1995 / Dynamics of Structures / Prentice Hall
Choudhury, A. R. / 1996 / Damage detection in structures using measured frequency response function data
Esfandiari, A. / 2013 / Theoretical and experimental structural damage diagnosis method using natural frequencies through an improved sensitivity equation / Int. J. Mech. Sci. 70:79~89
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