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Keywords: wave drift force
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27803-MS
... Abstract The paper identifies the wave drift forces and low frequency damping induced by a wide range of extreme sea conditions on two floating units based on model test data, assesses the limitations of today's numerical procedures and proposes solutions to overcome the limitations. Since wave...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 2015
Paper Number: OTC-25944-MS
... a variety of earlier case studies including model tests are reviewed. It is found that several items may be critical in the proper prediction of LF wave forces in high seas and combined current and should be investigated further, in particular: – Wave-current interaction – Viscous wave drift forces...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 2004
Paper Number: OTC-16715-MS
... frequency time domain simulation wave drift force subsea system simulation offshore technology conference otc 16715 connector gas monetization model test symo system liquified natural gas mooring system calculation lng carrier upstream oil & gas surge motion terminal single...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1999
Paper Number: OTC-10955-MS
.... Results of this approach include positioning accuracy and thruster loading in interaction effect control coefficient wave drift force semi submersible thrust force positioning accuracy azimuth angle coefficient environmental load subsea system otc 10955 model test upstream oil...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1997
Paper Number: OTC-8272-MS
... tanker motions with a high reliability could be carried out. Based on this program it became also possible to compute accurately the matrices of the quadratic transfer functions of the second order wave drift forces in 1980, see Ref. 2. In order to compute the low frequency (1.f.) tanker motions...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1994
Paper Number: OTC-7444-MS
... performs small amplitude WF pitch, heave and surge motions and relatively large amplitude low frequency surge motions around a mean surge displacement. The mean surge displacement is caused by the mean wave drift force and the steady wind force. The low frequency surge motions are due to the low frequency...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1993
Paper Number: OTC-7190-MS
... ABSTRACT The mean and low-frequency horizontal wave drift forces on 2 types of semi-submersible structures in regular and in irregular waves are determined from model tests and calculations. For the measurement of the low-frequency drift forces in irregular waves use is made of a special...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6594-MS
... surge motions. The frequency of the slowly oscillating motions corresponds to the natural surge frequency of the system. While the wave frequency motions are caused by the first order wave forces, the slowly oscillating motions are caused by the second order wave drift forces. Since the total damping...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6660-MS
... mooring system upstream oil & gas friction surge low-frequency vessel motion wave drift low-frequency surge motion subsea system prediction wave drift force OTe 6660 The Influence of Mooring Line Damping on the Prediction of Low-Frequency Vessel Motions at Sea K. Matsumoto, NKK Corp...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6605-MS
... ABSTRACT In the design of moored tankers the knowledge of the wave drift forces is of importance. As is known, the low frequency part of the wave drift forces is responsible for the low frequency motions of the vessel. In general the low frequency motions may cause a substantial part...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 7–10, 1990
Paper Number: OTC-6219-MS
... to severe weather areas. The behaviour of the moored system in wind, waves and current can affect design and operation aspects. References and illustrations at end of paper. 183 OTC 6219 (4) vessel with respect manoeuvring applications of turn and relatively following applies for a wave drift force vector...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1989
Paper Number: OTC-6135-MS
..., which involves simple calculation, in contrast with more complex calculation procedures. INTRODUCTION The problem of predicting the low frequency motions of moored vessels has primarily concentrated on the calculation of the second order wave drift forces that provide the excitation for such motions...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1988
Paper Number: OTC-5629-MS
... ABSTRACT In this paper the basic expressions for the computation of mean and low frequency second order wave drift forces on floating structures in directionally spread seas as can be derived from potential theory are discussed. The resultant expressions for the mean and slowly varying drift...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1988
Paper Number: OTC-5631-MS
... low frequency transfer function model test forward speed computation natural frequency coefficient regular wave tanker surge motion wave drift force surge direction frequency quadratic transfer function wave-current interaction effect moored tanker equation OTe 5631 Wave...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 27–30, 1987
Paper Number: OTC-5457-MS
.... The material is subject to correction by the author. Permission to copy is restricted to an abstract of not more than 300 words. . ABSTRACT The motions and mooring loads of storage/pro- duction tankers are dominated by large amplitude. low frequency components related to wave drift forces. In the design stage...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 27–30, 1987
Paper Number: OTC-5445-MS
... relative motion measurement wave condition relative motion standard deviation subsea system drift force wave direction feed-forward upstream oil & gas wind force force level wave drift force wave direction positioning drift force level simulation ship dynamic positioning...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1986
Paper Number: OTC-5085-MS
... trajectory ote 5085 offshore structure ice mass drift force procedure flow regime proximity della stritto assumption drift velocity separation limitation calculation geometry isaacson wave drift force current field british columbia upstream oil & gas OTe 5085 Motion...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1986
Paper Number: OTC-5175-MS
... computer simulation oscillation simulation contribution coefficient wave drift force upstream oil & gas dynamic contribution drift force subsea system tanker equation low frequency moored vessel frequency total wave drift force formulation irregular wave resistance...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 7–9, 1984
Paper Number: OTC-4813-MS
... the horizontal motions and, conse- quently, also the mooring forces. In order to pre- dict the amplitudes of the low _frequency resonant motions the magnitude of the second order wave drift forces and the values of the low frequency hydrody- namic damping must be known. The low frequency hydrodynamic potential...

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