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.16 No.2
- 발행연도
- 2015.1
- 수록면
- 281 - 294 (14page)
이용수
초록· 키워드
오류제보하기
Bolted joint connection is the most commonly used connection element in structures and devices. The loosening due to external dynamic loads cannot be observed and measured easily and may cause catastrophic loss especially in an extreme requirement and/or environment. In this paper, an innovative Real-time Cross-Correlation Method (RCCM) for monitoring of the bolted joint loosening was proposed. We apply time reversal process on stress wave propagation to obtain correlation signal. The correlation signal’s peak amplitude represents the cross-correlation between the loosening state and the baseline working state; therefore, it can detect the state of loosening. Since the bolt states are uncorrelated with noise, the peak amplitude will not be affected by noise and disturbance while it increases SNR level and increases the measured signals’ reliability. The correlation process is carried out online through physical wave propagation without any other post offline complicated analyses and calculations. We implemented the proposed RCCM on a single bolt/nut joint experimental device to quantitatively detect the loosening states successfully. After that we implemented the proposed method on a real large structure (reaction wall) with multiple bolted joint connections. Loosening indexes were built for both experiments to indicate the loosening states. Finally, we demonstrated the proposed method’s great anti-noise and/or disturbance ability. In the instrumentation, we simply mounted Lead Zirconium Titanate (PZT) patches on the device/structure surface without any modifications of the bolted connection. The low-cost PZTs used as actuators and sensors for active sensing are easily extended to a sensing network for large scale bolted joint network monitoring.
목차
등록된 정보가 없습니다.
참고문헌 (23)
참고문헌 신청
Amerini, F. / 2011 / Structural health monitoring of bolted joints using linear and nonlinear acoustic/ultrasound methods / Struct. Health Monit 10(6):659~672
Amerini, F. / 2010 / Detecting loosening/tightening of clamped structures using nonlinear vibration techniques / Smart Mater. Struct 19(8):085013
Argatov, I / 2010 / Health monitoring of bolted joints via electrical conductivity measurements / Int. J. Eng. Sci 48(10):874~887
Ayres, J. W. / 1998 / Qualitative impedance-based health monitoring of civil infrastructures / Smart Mater. Struct 7(5):599
Caccese, V. / 2004 / Detection of bolt load loss in hybrid composite/metal bolted connections / Eng. Struct 26(7):895~906
Amerini, F. / 2010 / Detecting loosening/tightening of clamped structures using nonlinear vibration techniques / Smart Mater. Struct 19(8):085013
Argatov, I / 2010 / Health monitoring of bolted joints via electrical conductivity measurements / Int. J. Eng. Sci 48(10):874~887
Ayres, J. W. / 1998 / Qualitative impedance-based health monitoring of civil infrastructures / Smart Mater. Struct 7(5):599
Caccese, V. / 2004 / Detection of bolt load loss in hybrid composite/metal bolted connections / Eng. Struct 26(7):895~906
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