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논문 기본 정보

자료유형
학술저널
저자정보
Hornarbakhsh, Amin (Honarbakhsh Construction Office) Nagayama, Tomonori (Department of Civil Engineering, the University of Tokyo) Rana, Shohel (Department of Civil Engineering, the University of Tokyo) Tominaga, Tomonori (Nippon Steel and Sumitomo Metal Corporation) Hisazumi, Kazumasa (Nippon Steel and Sumitomo Metal Corporation) Kanno, Ryoichi (Nippon Steel and Sumitomo Metal Corporation)
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제15권 제3호
발행연도
2015.1
수록면
787 - 806 (20page)

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Due to corrosion, a large number of belt conveyors support structure in industrial plants have deteriorated. Severe corrosion may result in collapse of the structures. Therefore, practical and effective structural assessment techniques are needed. In this paper, damage identification methods based on two specific local vibration modes, named periodic and isolated local vibration modes, are proposed. The identification methods utilize the facts that support structures have many identical members repeated along the belt conveyor and there exist some local modes within a small frequency range where vibrations of these identical members are much larger than those of the other members. When one of these identical members is damaged, this member no longer vibrates in those modes. Instead, the member vibrates alone in an isolated mode with a lower frequency. A damage identification method based on frequencies comparison of these vibration modes and another method based on amplitude comparison of the periodic local vibration mode are explained. These methods do not require the baseline measurement records of undamaged structure. The methods is capable of detecting multiple damages simultaneously. The applicability of the methods is experimentally validated with a laboratory model and a real belt-conveyor support structure.

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