... to calculate drag forces along the tendon and TBM assembly. In addition to using the composite current dataset in understanding the relationship of offset to current loads and instances of Vortex Induced Vibration/Motion (VIM/VIM), the time trace of current velocity near the top of the TBMs became quite...

... by the "damping" effect, however, how the damping works was never clearly demonstrated. The third observation is actually contradictive to the damping effect as less strake length results in smaller drag forces and thus less damping. All of the above phenomena are related to the hydrodynamic forces...

... global drilling riser and wellhead fatigue analysis. geometry diameter reference diameter drilling equipment scenario drag coefficient bop stack drag force lateral oscillation pressure contour diagonal diameter well control equipment fluid dynamics coefficient upstream oil & gas...

... umbilical upgrade operation rlwi mkii system well intervention chemical umbilical production enhancement upstream oil & gas harsh environment knowledge management wcp drag force new chemical umbilical riserless light well intervention operation offshore technology conference shetland...

... Abstract This paper presents the results of a series of physical experiments to quantify the drag force on a submarine pipeline caused by a glide block or an out-runner block impact normal to the pipe axis. The experiments were carried out in a geotechnical centrifuge at C-CORE under submerged...

... sway software upstream oil & gas subsea system conservatism analysis method point steel steel semi-taut current velocity prediction quasi-static analysis investigation drag force seasoft water depth 3 blue wire 3 steel catenary surge lower-bound sway kip displacement polyester...

... OTC 19173 Submarine Debris Flow Impact on Pipelines: Drag Forces, Mitigation, and Control Arash Zakeri, Kaare Hoeg, and Farrokh Nadim, University of Oslo (UiO)/International Centre for Geohazards (ICG) Copyright 2008, Offshore Technology Conference This paper was prepared for presentation...

... were strategically employed based on the ballistic results. This was done singularly or in combination as circumstance dictated. vessel strain energy vertical motion header safety calculation pressure cap drag force reynolds number ballistic potential personnel upstream oil & gas...

... IN FULL PAPER) university load model inline force drag force machine learning inline oscillation morison equation interaction relative velocity model coefficient force component oscillation frequency oscillation frequency velocity model validation upstream oil & gas cylinder...

... of the restoring force. In several application, the drag force created by the weight of the string is so high that this additional friction force cannot be tolerated. The moving force therefore should be as low as possible. The third force by which a centralizer is characterized is the starting force...

... template lower deck acta 1000 positioning octo 1000 drilling equipment drag force riser string installation operation template manifold transport water depth manifold protective rail petrobras padeye atc 6979 aTC 6979 aCTas 1000 Template Manifold Transport and Installation Using Anchored...

... of large, but spurious responses. The Morison Equation with the use of perpendicular, relative (water - structure) velocities and accelerations forms the basis for the current study. The model is to be used in the time domain. With relative velocities present, the drag force is both an excitation...

... are predominantly controlled by the low Kc numbers. The wave exciting forces are mainly inertial and drag forces are very small or even negligible for moderate seas. The behaviour of the oscillatory-flow at low Kc numbers is an unique problem. At low Kc numbers there is little time available for the flow-separation...

... SUMMARY Previous OTC papers (Refs. 1, 2, 3) have shown that drag forces on the mooring lines can represent the dominating contribution to the surge damping of moored vessels. They have also shown that in order to calculate this damping effect correctly one normally has to take into account...

...). Floater motion response normally also peaks in this region. Furthermore it should be noticed that the fluid inertia is often smaller than the inertia of the riser itself. Drag forces are therefore con- sidered to be dominant for the response of riser systems to extreme wave conditions. This evaluation...

... decay test surge frequency offshore technology conference contribution coefficient calculation lf surge amplitude surge motion irregular wave upstream oil & gas mooring system calm water surge decay test subsea system line motion energy dissipation drag force hf motion...

... customary to neglect the drag forces on the mooring lines when estimating the surge and sway damping of moored offshore platforms and ships. The argument for this has been that the drag area represented by the mooring lines is very small compared to the drag area of the vessel itself. However, as explained...

... wake consideration cylinder drag force drag coefficient keulegan-carpenter number contribution oscillatory flow calculation oscillation relative velocity stationary flow upstream oil & gas velocity profile coefficient theoretical curve simulation verification oscillatory...

... wind simulation system lift force aerodynamic test machine learning equation correlation numerical model wind load standard deviation drag force orientation regression model wind speed coefficient turbulence level simulation upstream oil & gas ocean ranger hydrodynamic model...

... range of test parameters allows the cables to be well characterized. cable drag data cable geometry drag coefficient reynolds number characteristic coefficient drag force lift coefficient hydrodynamic force cable model equation yaw angle hydrodynamic characteristic otc 5521...