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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Smart Structures and Systems, An International Journal Smart Structures and Systems, An International Journal Vol.17 No.3
- 발행연도
- 2016.1
- 수록면
- 413 - 429 (17page)
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초록· 키워드
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The recent research on proper orthogonal decomposition (POD) has revealed the linkage between proper orthogonal modes and linear normal modes. This paper presents an investigation into the modal identifiability of an instrumented cable-stayed bridge using an adapted POD technique with a band-pass filtering scheme. The band-pass POD method is applied to the datasets available for this benchmark study, aiming to identify the vibration modes of the bridge and find out the so-called deficient modes which are unidentifiable under normal excitation conditions. It turns out that the second mode of the bridge cannot be stably identified under weak wind conditions and is therefore regarded as a deficient mode. To judge if the deficient mode is due to its low contribution to the structural response under weak wind conditions, modal coordinates are derived for different modes by the band-pass POD technique and an energy participation factor is defined to evaluate the energy participation of each vibration mode under different wind excitation conditions. From the non-blind datasets, it is found that the vibration modes can be reliably identified only when the energy participation factor exceeds a certain threshold value. With the identified threshold value, modal identifiability in use of the blind datasets from the same structure is examined.
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참고문헌 (23)
참고문헌 신청
Bergermann, R. / 1996 / Ting Kau Bridge, Hong Kong / Struct. Eng. Int. 6(3):152~154
Chelidze, D. / 2006 / Smooth orthogonal decomposition-based vibration mode identification / J. Sound Vib 292(3):461~473
Farooq, U. / 2008 / Smooth orthogonal decomposition for modal analysis of randomly excited systems / J. Sound Vib 316(1):137~146
Feeny, B. F. / 2002 / On proper orthogonal co-ordinates as indicators of modal activity / J. Sound Vib 255(5):805~817
Feeny, B.F. / 1998 / On the physical interpretation of proper orthogonal modes in vibrations / J. Sound Vib 211(4):607~616
Chelidze, D. / 2006 / Smooth orthogonal decomposition-based vibration mode identification / J. Sound Vib 292(3):461~473
Farooq, U. / 2008 / Smooth orthogonal decomposition for modal analysis of randomly excited systems / J. Sound Vib 316(1):137~146
Feeny, B. F. / 2002 / On proper orthogonal co-ordinates as indicators of modal activity / J. Sound Vib 255(5):805~817
Feeny, B.F. / 1998 / On the physical interpretation of proper orthogonal modes in vibrations / J. Sound Vib 211(4):607~616
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