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On the Time-Mean Drift Force Acting on a Floating Offshore Structure in Wave  

홍도천 (한국해양연구원 해양개발시스템연구본부)
Publication Information
Journal of Ocean Engineering and Technology / v.16, no.3, 2002 , pp. 8-18 More about this Journal
Abstract
Formulation of the far-field method for the prediction of time-mean hydrodynamic force and moment acting on a 3-D surface-piercing body in waves is reviewed. It is found that the inequality between the weight of the floating body and its buoyancy force permits the replacement of the fluid particles inside the control surface by the fluid particles outside the control surface. Under such circumstances, momentum exchanges across the control surface make the time-mean value of the time rate of the momentum of the fluid inside the control surface non-vanishing. It is a second-order quantity which is hard to calculate by the far-field method. The drift forces and moments on half-immersed ellipsoids are calculated by both the far-field method and the near-field method. The discrepancy between two numerical results is presented and discussed.
Keywords
Time-Mean Wave Drift Forces and Moments; Far-Field Method; Near-Field Formula; Non-Zero Time-Mean Momentum Flux;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 대형 해양구조물에 작용하는 파랑하중에 관하여 /
[ 홍도천;홍사영;이상무 ] / 한국해양공학회지   과학기술학회마을
2 Contribution of hydrostatic pressure to the steady horizontal drift Forces and the vertical drift moment acting on a floating body in waves /
[ Hong, D.C. ] / International Journal of Ocean Engineering and Technology
3 Second-order hydrodynamic effects on ocean platforms /
[ Ogilvie, T.F. ] / Proceedings of the International Workshop on Ship and Platform Motions
4 Computation of the first and second order wave forces on oscillating bodies in regular waves /
[ Pinkster, J.A.;van Oortmerssen, G. ] / Proc. 2nd Int. Conference on Numerical Ship Hydrodynamics
5 On second-order motion and vertical drift forces for three dimensional bodies in regular waves /
[ Molin, B. ] / Proceedings of the International Warkshop on Ship and Platform Motions
6 The drift force and moment on ships in waves /
[ Newman, J.N. ] / Journal of Ship Research
7 The drift of a body floating in waves /
[ Maruo, H. ] / Journal of Ship Research
8 On the Improved Green integral equation applied to the water-wave radiation-diffraction problem /
[ Hong, D.C. ] / Journal of the Society of Naval Architect of Korea   과학기술학회마을