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韓國海洋工學會誌 = Journal of ocean engineering and technology v.32 no.5, 2018년, pp.341 - 350  
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강제가진조건에서 자유롭게 매달린 PVC 파이프의 와류유기진동 특성에 관한 시험 연구
Experimental Study of VIV Characteristics of Free Hanging PVC Pipe under Forced Oscillation Conditions

권용주   (한국해양과학기술원 부설 선박해양플랜트연구소  ); 정동호   (한국해양과학기술원 부설 선박해양플랜트연구소  ); 박병원   (한국해양과학기술원 부설 선박해양플랜트연구소  ); 정재환   (한국해양과학기술원 부설 선박해양플랜트연구소  ); 오승훈   (한국해양과학기술원 부설 선박해양플랜트연구소  );
  • 초록

    A series of model tests was carried out to investigate the vortex-induced vibration (VIV) characteristics of a free hanging PVC pipe under forced oscillation conditions. The prescribed displacement with a period and amplitude was forced at the top of the riser. The motion of the riser along its length was measured with underwater cameras in three dimensions. The top-excited responses in the inline direction and vortex-induced vibration in the cross-flow direction were examined in the time and frequency domains. Multi-peak frequencies in the VIV were demonstrated to be strongly dependent upon the Keulegan-Carpenter number, corresponding with the results of Blevin. It was found that the Reynolds numbers (excitation period) was a critical parameter for the dominant VIV characteristics, even under the condition of using the same Keulegan-Carpenter number, under the top-excited condition. In the resonance at the nth natural frequency by the forced-motion induced VIV frequency, the riser responded with a large amplitude and forced frequency, dominantly in the VIV CF direction.


  • 주제어

    와류유기진동 특성 .   시험연구 .   강제가진 .   환경하중 .   라이저.  

  • 이미지/표/수식 (15)

    논문관련 이미지

  • 참고문헌 (12)

    1. Blevin R.D., 2001. Flow-Induced Vibration. Second edition. 
    2. Gustafsson, A., 2012. Analysis of Vortex-Induced Vibrations of Risers. Master's Thesis, Chalmers University of Technology, Gothenburg, Sweden. 
    3. Joseph, R.S., Wang, J., Ong, M.C., Jakobsen, J.B., 2017. Vortex-induced Vibration (VIV) Effects of a Drilling Riser Due to Vessel Motion. First Conference of Computational Methods in Offshore Technology(COTech2017), 276, 1-10. 
    4. Jung, D.H., Kwon, Y.J., Park, B.W., Jung, J.H., Choi, J.S., Cho, S.K., Sung, H.G., 2018. Study on the Measurement System of Behavior of a Slender Structure Using an Underwater Camera Which is Applied in DOEB. Journal of Navigation and Port Research, 42, 1-7. 
    5. Liang, S., Wang, J., Hu, Z., 2018. Vortex-induced Vibration of a Circular Cylinder with Fairings. Proceedings of the Twentyeighth International Ocean and Polar Engineering Conference, 1, 966-970. 
    6. Park, H.I., Cho H.J., Jung, D.H., 1999. Response Analysis of Deep Ocean Risers to Vortes-Shedding by Numerical Analysis. Journal of Ocean Engineering Technology, 13, 65-72. 
    7. Pettersen, J., Nilsen, O., Vist, S., Noreng Giljarhus, L.E., Fredheim, A.O., Aasekjaer, K., Neeraas, B.O., 2013. Technical and Operational Innovation for Onshore and Floating LNG. 17th International Conference & Exhibition on Liquefied Natural Gas(LNG 17), 1. 1-12. 
    8. Sukhov, A.A., 2017., VIV Prediction of Steel Lazy Wave Riser. Master's Thesis, University of Stavanger, Stavanger, Norway. 
    9. Sun, H., Xiao, S., 2018. Experimental Study on Vortex-induced Motions of Floating Cylinder Considering the Impact of Helical Strakes. Proceedings of the Twenty-eighth International Ocean and Polar Engineering Conference, 1, 961-965. 
    10. Wang, J.G., Fu, S.X., Wang, J.S., Li, H.J., Ong M.C., 2017. Experimental Investigation on Vortex-induced Vibration of a Free-hanging Riser under Vessel Motion and Uniform Current. Journal of Offshore Mechanics and Arctic Engineering, 139(4), OMAE-16-1048. 
    11. Yin, D., Passano, E., Lie, H., 2018. Dynamic Response of a Top-tensioned Riser Under Vessel Motion. Proceedings of the Twenty-eighth International Ocean and Polar Engineering Conference, 1, 979-986. 
    12. Zhao, Z., 2011. Calculation of Fatigue Damage for Tensioned Risers from Vortex Induced Vibrations. Master's Thesis, Norwegian University of Science and Technology, Trondheim, Norway. 

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