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Journal of Marine Science and Technology

, Volume 1, Issue 3, pp 155–173 | Cite as

Hydrodynamic forces acting on a circular cylinder oscillating in waves and a small current

  • Takeshi Kinoshita
  • Weiguang Bao
Original articles

Abstract

A complete theory to obtain semianalytical solutions of the wave drift damping for a circular cylinder freely oscillating in waves is developed. The wave drift damping can be significantly increased by heave and pitch motions. Effects of the draft of the cylinder and effects of the water depth are shown. The effective evaluation of the free-surface integral and the corner problem are also discussed, and the computed results of the far and near field formulations are compared. These semianalytical solutions may prove to be important in providing validation of results obtained by numerical techniques such as the higher-order boundary element method.

Key words

wave drift damping slow drift motion small currents circular cylinders 

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References

  1. 1.
    Herfjord K, Nielsen FG (1992) A comparative study on computed motion response for floating production platforms: discussion of practical procedures. Proceedings of the 6th International Conference on the Behaviour of Offshore Structures BOSS '92, Imperial College, London, pp 19–37Google Scholar
  2. 2.
    Wichers JEW, Huijsmans RHM (1984) On the low-frequency hydrodynamic damping forces acting on offshore moored vessels. Proceedings of the Offshore Technology Conference, OTC 4813:315–324Google Scholar
  3. 3.
    Hearn GE, Tong KC (1986) Wave drift damping coefficient predictions and their influence on the motions of moored semisubmersible Proceedings of the Offshore Technology Conference, OTC 5176:229–241Google Scholar
  4. 4.
    Eatock Taylor R, Teng B (1993) The effects of corners on diffraction/radiation forces and wave drift damping, Proceedings of the Offshore Technology Conference, OTC 7187:571–581Google Scholar
  5. 5.
    Matsui T, Lee SY, Sano K (1991) Hydrodynamic forces on a vertical cylinder in current and waves (in Japanese). J Soc Nav Archit Jpn 170:277–287Google Scholar
  6. 6.
    Emmerhoff OJ, Sclavounos PD (1992) The slow-drift motion of arrays of vertical cylinders. J Fluid Mech 242:31–50CrossRefGoogle Scholar
  7. 7.
    Bao W, Kinoshita T (1993) Circular cylinder oscillating in waves and small current. J Soc Nav Archit Jpn, 174:193–203Google Scholar
  8. 8.
    Malenica S, Clark PJ, Molin B (1995) Wave and current forces on a vertical cylinder free to surge and sway. Appl Ocean Res 17:79–90CrossRefGoogle Scholar
  9. 9.
    Nossen J, Grue J, Palm E (1991) Wave forces on three-dimensional floating bodies with small forward speed. J Fluid Mech 227:135–160CrossRefGoogle Scholar
  10. 10.
    Yeung RW (1981) Added mass and damping of a vertical cylinder in finite-depth waters. Appl Ocean Res 3:119–133CrossRefGoogle Scholar
  11. 11.
    Wehausen JV, Laitone EV (1960) Surface waves. In: Flügge S (ed) Handbuch der Physik. Springer, Heidelberg, pp 592–602Google Scholar
  12. 12.
    Ogilvie TF, Tuck EO (1969) A rational strip theory of ship motions: part 1. Report No 013, Department of Naval Architecture and Marine Engineering, University of Michigan, Ann ArborGoogle Scholar
  13. 13.
    Timman R, Newman JN (1962) The coupled damping coefficients of a symmetric ship. J Ship Res 5:1–7Google Scholar
  14. 14.
    Grue J, Palm E (1993) The mean drift force and yaw moment on marine structures in waves and current. J Fluid Mech 250:121–125CrossRefGoogle Scholar
  15. 15.
    Clark PJ, Malenica S, Molin B (1993) An heuristic approach to wave drift damping. Appl Ocean Res 15:53–55CrossRefGoogle Scholar
  16. 16.
    Aranha JAP (1994) A formula for wave damping in the drift of a floating body. J Fluid Mech 275:147–155CrossRefMATHMathSciNetGoogle Scholar

Copyright information

© SNAJ 1996

Authors and Affiliations

  • Takeshi Kinoshita
    • 1
  • Weiguang Bao
    • 1
  1. 1.Institute of Industrial ScienceUniversity of TokyoTokyoJapan

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