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Keywords: irregular wave
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Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 2001
Paper Number: OTC-13189-MS
... includes different wave theories for determining the wave kinematics. The wave kinematics can be based on a deterministic wave maintaining its shape and crest height as it travels through the deck structure or it can be based on a stochastic irregular wave time series. The following kinematics modules can...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1994
Paper Number: OTC-7420-MS
... platform shaft coefficient loading simulation procedure upstream oil & gas frequency otc 7420 irregular wave elevation time domain simulation knowledge management wave train diffraction effect time domain estimation time history amplitude @l 8 c OTC 7420 Time Domain...
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 3–6, 1993
Paper Number: OTC-7143-MS
... tanker computation foil thrust horizontal motion amplitude fpso model test thrust upstream oil & gas head sea bow foil reduction offshore technology conference foil irregular wave mean thrust low-frequency motion drift force subsea system floating production system...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6591-MS
... ABSTRACT This paper summarizes the laboratory studies of three principle jack-up models tested in irregular waves. The models tested can be categorized into two groups according to their nonlinear properties: Hydrodynamic drag with a nonlinear structure and Relative motion type...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6660-MS
... with theoretical estimations. The results show that the main contribution to low-frequency surge damping is due to mooring system. For the prediction of low-frequency surge motions in irregular waves time domain simulation calculations are performed with and without mooring line damping. Their results are also...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1989
Paper Number: OTC-6137-MS
... and by irregular wave tests. A theory and numerical method is presented for calculating the surge damping due to the mooring system. The numerical results compare very well with experiments as far as a pure sinusoidal low frequency surge is concerned, but not so well in the case of superposed high frequency...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1989
Paper Number: OTC-6168-MS
... ABSTRACT In this paper results of flexible riser model tests will be discussed and compared with results of time domain simulations for regular and irregular wave conditions with current. The model tests were performed at the Maritime Research Institute Netherlands (MARIN) with a large scale...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1988
Paper Number: OTC-5878-MS
... understanding of the data and the most reliable input to the design. module subsidence spectrum 1 breakwater wall wave crest elevation crest elevation crest height tank irregular wave design value hydrodynamic model testing spectra 2 elevation module force deck force inner tank wave...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 27–30, 1987
Paper Number: OTC-5456-MS
...~ responses in irregular waves. 307 RECENT DEVELOPMENTS IN THE ANALYSIS OF WAVE DRIFT FORCES, LOW FREQUENCY DAMPING AND RESPONSE decay OTC 5456 ax The only way in Which forward speed enters this analysis is through the change in wave encounter frequency Oe. We assume that the wave damping is due to changes...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 27–30, 1987
Paper Number: OTC-5606-MS
... in the test, which are equivalent to I and 2 m at the site. A Study on the Installation of a Submerged Caisson in Deep Waters2 3-2. Irregular Wave: The relation between significant wave height (Hl/3) and period (Tl/3) in the ocean is given following equation in reference No. (3). !13Hl/3 < Tl/3 < /30Hl/3...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 27–30, 1987
Paper Number: OTC-5579-MS
... of a moored floating structure generally occurs at very low natural frequencies in the horizontal plane. In irregular waves this resonance isexcited by the slowly varying second order drift force. In the last decade, estimation of the maximum excursions of the structure caused by this resonance phenomenon...
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 &amp; 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-4814-MS
... included in the motion analysis. The theory is extended from regular waves to apply to irregular waves. The test consisted of measuring the six degrees of motion of the cylinder and the loads in the mooring lines in regular waves, wave groups and irregular waves. The theoretical results are correlated...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1983
Paper Number: OTC-4454-MS
... arising from the application of data from tests in steady current or re- gular waves to irregular waves or to the combination of waves and currents are avoid- ed. Hydrodynamic coefficients for drag, in- ertia, and lift forces appropriate for use in common industry formulas for pipelines are determined...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 1983
Paper Number: OTC-4603-MS
... of motion responses in regular waves are shown to be in good agreement with those of experiments carried out on a scale model of an actual crane barge. Calculation of motion responses of a few types of crane vessels in irregular waves and a trial estimation of workability thereof are presented to show...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1982
Paper Number: OTC-4436-MS
... series and the springs were pretension so that they never went slack. The tests included the regular waves, wave groups and the irregular waves. The motions of the floating vessel and the loads in the mooring lines were measured. The steady wave drift force on the model and the long period oscillating...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 4–7, 1981
Paper Number: OTC-3951-MS
... in regular and irregular waves. The mean vertical drift forces on a submerged horizontal cylinder obtained from model tests are also compared to results of computations. On the basis of these comparisons it is concluded that wave drift forces on semi-submersible type structures in conditions of waves without...
Proceedings Papers

Paper presented at the Offshore Technology Conference, April 30–May 3, 1979
Paper Number: OTC-3517-MS
... by a computer analysis programs system. The model tests used a 1/60-scale Froude model of a launching barge carrying the equivalent of a 25,000-ton jacket. The tests conducted included wind load tests, as well as sea-keeping tests for regular and irregular waves. In this series of tests, measurements were taken...

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