.... offshore technology conference cfd result natural period simulation model scale platform subsea system openfoam calculation antony cfd simulation experimental result coefficient model test vortex turbulence model sway vim reynolds number upstream oil & gas vim response OTC-26950...

... treatment of previously recorded in-situ BOP motion data. hp housing extension sway lp housing seastate limit standard deviation permissible bop inclination conductor significant wave height abandonment operation vessel motion inclination upstream oil & gas vessel surge bop...

... current field contribution johan wicher coefficient initial position simulation otc 12086 moored tanker sway model test computation resistance coefficient viscous reaction force low-frequency viscous reaction force head current surge direction coupling term equation Copyright...

... installed on board were duplicated. Eighteen measurement channel were recorded by the data logging system. These channels comprised: 3 environment channels:- wave height, wind speed and wind direction. 8 vessel motion channels:- sway, surge, heave, roll and pitch displacements, roll, pitch and yaw...

.... The spreading function for the mUltidirectional waves was of the form cos2a about a mean direction along the centreline of the tank. The following measurements were made: '" surge, sway and yaw motions of the barge, by means of light lines ( stretched across and along the tank) turning pulleys...

... pipe upstream oil & gas frequency surge accelerometer calculation sway motion measurement period time operation laboratory gyro sensor platform heave otc 5028 accuracy motion system computer barge motion OTC 5028 Wave and Motion Measurements on Board the Semisubmersible...

... '2}t CMy·M y (t b) - y (ta ) energy equation for sway CMy·M{y(t b) - y(t a )} momentum equation for sway t bf F(t).QG.cos cx.dt t a t bf F(t).cos cx.dt t a the ship faster and as a result the measured peal load at the contact point would be lower. The ship was connected to two endless wires b~ means...

... simulation noise predictor spectrum cambridge prediction time sway kalman filter modeling equation transfer function prediction modal frequency white noise frequency approximation heave sea spectrum r- matrix Q@ ui l @ Q ~ IA s s OTC 4388 ~ll!l!ly @+ 4+ Real Time...

... cooperation with Gusto Engineering. Motion measurements were taken in such a way that all six degrees of freedom of the barge could be taken into account. Heave, surge, sway, roll, pitch and yaw values were determined afterwards by means of spectral calculating techniques. In the data analysis a separation...

... coefficient upstream oil & gas displacement buoyancy pretension natural period consideration analytical approach water depth atension leg platform platform sway sea state surge leg platform tlp subsea system mooring system stiffness coefficient equation OTC 3883 ANALYTICAL APPROACH...

... four tension legs linked to vertical tethers. The water depth is 150 m (Fig. 2). leg production platform wave amplitude coupling term wave period yaw contribution nonlinear effect subsea system amplitude sway simulation coupling wave direction surge mooring system line force...

... derrick lay barge measuring 123 m in length, 28.6 m in breadth, and 8.0 m in height. crane operation suspension operability kuroshio sway barge offshore structure relation reservoir characterization hoisting natural period construction upstream oil & gas crane boom positioning...

... ABSTRACT This paper presents analysis of the response of a tension-leg single buoy mooring system subjected to regular wave excitation. The buoy consists of a cylinder anchored to the sea bed by parallel chains. The nonlinear equations of swaying and pitching motion are derived from Morison's...

... ABSTRACT Ship and mooring line responses are studied for spread mooring systems and for ships moored parallel to a quay. subharmonic responses are studied in detail, where the equations of ship motion are uncoupled and where wave excitation is harmonic. This model represents surge and sway...

... the kinematic boundary condition on the restrained hull. This approach was extended by Tamuraz to the calculation of sway and roll exciting forces and moments on Lewis form cylinders, restrained in beam seas. The fundamental approach. developed by Grim was extended by Kind to include a much greater variety...

... of complex-response oper- ators are compared with. those obtained f'rom the prototype and model measurements. Generally, the agreement in both amplitude and phase is excellent for the surge, sway, roll, heave and pitch motions. Discrepancies which are found to exist f'or certain heading and wavelength...