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.
이용수
초록· 키워드
오류제보하기
Because a change in the natural frequencies of a structure indicates structural health problems, monitoring the natural frequencies crucial. Long-term measurement for the Uldolmok tidal current power plant structure has shown that its natural frequencies fluctuate with a constant cycle twice a day. In this study, lab-scale tests to investigate the causes of these natural frequency fluctuations were carried out in a circulating water channel. Three independent variables in the tests that could affect the fluctuation of the natural frequencies were the water level, current velocity, and boundary condition between the specimen and the bottom of the circulating water channel. The experimental results were verified with numerical ones using ABAQUS. It was found that the fluctuation of the natural frequencies was governed by a decrease in stiffness due to the boundary condition much more than the effect of added mass. In addition, it was found that the natural frequency would decrease with an increase in the tidal current velocity because of its nonlinearity when the boundary condition was severely deteriorated due to damage.
목차
ABSTRACT
1. 서론
2. 회류수조를 이용한 실내실험 개요
3. 수치모델링을 통한 비교 검증
4. 결론
References
참고문헌 (12)
참고문헌 신청
Dassault Systemes Simulia Corp / Abaqus/CAE user’s manual. Version 6.10, Rhode Island, USA
DNV / 2010 / Recommended Practice DNV-RP-C205 Environmental Conditions and Environmental Loads
Hallam, M. G / 1977 / Dynamics of Marine Structures: Methods of Calculating the Dynamic Response of Fixed Structures Subject to Wave and Current Action
Hwang, D. H / 2013 / Study of Hydraulic Properties and Stability Evaluation using Hydraulic Experiment of POD-LOCK / Proceedings of the Korea Society for Marine Environment and Energy 2013(5):62
Korea Ocean Research and Development Institute (KORDI) / 2011 / Development of Utilization Technique for Tide and Tidal Current Energy
DNV / 2010 / Recommended Practice DNV-RP-C205 Environmental Conditions and Environmental Loads
Hallam, M. G / 1977 / Dynamics of Marine Structures: Methods of Calculating the Dynamic Response of Fixed Structures Subject to Wave and Current Action
Hwang, D. H / 2013 / Study of Hydraulic Properties and Stability Evaluation using Hydraulic Experiment of POD-LOCK / Proceedings of the Korea Society for Marine Environment and Energy 2013(5):62
Korea Ocean Research and Development Institute (KORDI) / 2011 / Development of Utilization Technique for Tide and Tidal Current Energy
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UCI(KEPA) : I410-ECN-0101-2015-550-002605996