Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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An Experimental Study on the Effects of Bow Flare Angle about Green Water in Regular Waves

규칙파 중 갑판침입수에 미치는 선수 플레어 각도의 영향에 관한 실험적 연구

  • Ha, Yoon-Jin (Dept. of Naval Architecture and Ocean Engineering, Graduate School, Inha University) ;
  • Lee, Young-Gill (Dept. of Naval Architecture and Ocean Engineering, Inha University) ;
  • Jeong, Kwang-Leol (Dept. of Naval Architecture and Ocean Engineering, Graduate School, Inha University)
  • 하윤진 (인하대학교 대학원 조선해양공학과) ;
  • 이영길 (인하대학교 기계공학부 조선해양공학) ;
  • 정광열 (인하대학교 대학원 조선해양공학과)
  • Received : 2011.07.29
  • Accepted : 2012.01.02
  • Published : 2012.02.20
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Abstract

It is very important to investigate and understand the motion of a FPSO on waves because green water phenomenon occurs owing to the relative motions between incident waves and a ship on them. In this research, both experimental and some numerical approaches have been performed in head sea conditions with regular waves. As an object model of this research, a FPSO model is set free to heave and pitch during the experiments. Also, the motions of the FPSO model which are the results of the experiments are used for the corresponding numerical computations. The purpose of this study is to clarify the effect of bow flare on green water load. In this research, it is found that the amount of green water entered from the side of bow is decreased by the increase of bow flare angle. Moreover, the relation between the green water on the bow upper deck and the impact load on the vertical wall located at turrethead is investigated. The results of this research could be used as one of the fundamental data to design bow flares. Also, an optimized bow flare angle is proposed in this study.

Keywords

References

  1. Buchner, B., 2002. Green Water on Ship-Type Offshore Structures. Ph. D thesis, Delft University of Technology, The Netherlands.
  2. Barcellona, M. Landrini, M. Greco, M. & Faltinsen, O.M., 2003. An Experimental Investigation on Bow Water Shipping. Journal of Ship Research, 47(4), pp.327-346.
  3. Dallinga, R.P. & Gaillarde, G., 2001. Hatch Cover Loads Experienced by M. V. Derbyshire during Typhoon Orchid, International Workshop on Safety of Bulkcarriers, Glasgow.
  4. Ersdal, G. & Kvitrud, A., 2000. Green water Incident on Norwegian Production Ships. 10th International Society of Offshore and Polar Engineering Conference, Seattle, United States of America, 1, pp.211-218.
  5. Faulkner, D., 2001. Survival Design of Cargo Hatch Structures. RINA Congerence Design and Operation for Abnomal Conditions II, London, United Kingdom.
  6. Faltisen, O.M. Greco, M. & Landrini, M., 2002. Green Water Loading on FPSO. Journal of Offshore Mechanics and Arctic Engineering.
  7. Greco, M. Faltinsen, O.M. & Landrini, M., 2005. Shipping of Water on A Two-dimensional Structure. Journal of Fluid Mechanics, 525, pp.309-332. https://doi.org/10.1017/S0022112004002691
  8. Jeong, K.L. Lee, Y.G. & Kim, N.C., 2009. A Fundamental Study for the Numerical Simulation Method of Green Water Occurrence on Bow Deck. Journal of the Society of Naval Architects of Korea, 47(2), pp.188-195. https://doi.org/10.3744/SNAK.2010.47.2.188
  9. Leonhardsen, R.L. Ersdal, G. & Kvitrud, A., 2001. Experience and Risk Assessment of FPSOs in Use on the Norwegian Continental Shelf: Descriptions of Events. 11th International Society of Offshore and Polar Engineering Conference, Stavanger, Norway, 1, pp.309-314.
  10. Lloyd, A.J.R.M. Salsich, J.O. & Zseleczky, J.J., 1985. The Effect of Bow Shape on Deck Wetness in Head Seas, RINA.
  11. O'Dea, J.F. & Walden, DA., 1984. The Effect of Bow Shape and Nonlinearities on the Prediction of Large Amplitude Motion and Deck Wetness. 15th Symposium On Naval Hydrodynamics, Hamburg, National Academy Press, Washington D.C., pp.163-176.
  12. Shin, K.S., 2005. Numerical Calculation and Experiment of Green Water on the Bow Deck in Regular Waves. Journal of the Society of Naval Architects of Korea, 42(4), pp.350-356. https://doi.org/10.3744/SNAK.2005.42.4.350