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http://dx.doi.org/10.26748/KSOE.2018.6.32.5.341

Experimental Study of VIV Characteristics of Free Hanging PVC Pipe under Forced Oscillation Conditions  

Kwon, Yong-Ju (Korea Research Institute of Ships and Ocean Engineering, KRISO)
Jung, DongHo (Korea Research Institute of Ships and Ocean Engineering, KRISO)
Park, Byeong-Won (Korea Research Institute of Ships and Ocean Engineering, KRISO)
Jung, Jae-Hwan (Korea Research Institute of Ships and Ocean Engineering, KRISO)
Oh, Seunghoon (Korea Research Institute of Ships and Ocean Engineering, KRISO)
Publication Information
Journal of Ocean Engineering and Technology / v.32, no.5, 2018 , pp. 341-350 More about this Journal
Abstract
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.
Keywords
VIV(Vortex-induced vibration) characteristics; Experimental study; Forced oscillation; Environmental loads; Riser;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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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 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.
12 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.