... Abstract Increasing activity within offshore wind energy and related installations has raised the focus on the integrity and fatigue life of power cables and umbilicals. A limiting factor for assessing fatigue life has been the lack of efficient and precise computational tools...

... side spread mooring system applied upstream oil & gas simulation environment condition lng carrier subsea system marine loading arm operability side-by-side west africa computation numerical computation offshore technology conference Introduction When an offshore gas field...

... Abstract Computational Fluid Dynamics (CFD) tools have progressed greatly in the past decades in such a manner that they have become a recurring tool during the workflow of an engineering project. In the specific case of Marine and Offshore Engineering, these tools are more and more used...

... Abstract Permanent floating offshore facilities can be subjected to substantial environmental loads in the Gulf of Mexico, especially during the hurricane season. This paper focuses on the procedures required for the accurate computation of the floating system kinematics based on the output...

... in heave cancels at a given wave length depending on the geometry of the column and pontoon arrangement. Fig 1 riser designer natural period upstream oil & gas geometry model test frequency displacement computation arrangement cancellation period offshore technology conference...

... Abstract In the framework of the studies on the DeepStar Theme Structures for deepwater in the Gulf of Mexico, contractors and research institutes have carried out series of pre-model test computations. The DeepStar Theme Structures are a turret moored FPSO, a classic SPAR and a standard TLP...

..., are associated with the primary pressure system around the sailing vessel which acts upon the moored ship. In this paper some of the aspects which play a role in effects due to passing ships will be treated. In order to do so, two computational methods developed by the first author to predict the low frequency...

... Abstract Due to the restricted water depth of experimental facilities one has to rely more on computational tools for the design of turret and spread moored tanker based FPSOs in deep water. These tools have to be as accurate as possible. The mechanics to compute dynamically mooring lines...

... significantly. In such cases it is appropriate to evaluate the stability (factor of safety) as a spatially varying quantity. This paper addresses the stability of slopes over large areas and schemes for computing the factor of safety as a spatially varying quantity. Traditional methods used to compute...

... of oscillations and different load levels, effecting the strength and fatigue of turret and mooring legs. In this paper an attempt is carried out to show the benefits of DP assisted turret moored FPSO units in deep water. For deep to ultra deep water computer programs are valuable design tools. control...

... (in case of polyester ropes). The model tests demonstrated the favourable offsets provided by a TMS. Apart from offset (including slowly varying motions), there were no large differences in motions characteristics between a TMS and a CMS. The comparison to computations did also reveal the difficulty...

... it appears that these models have some critical limitations. The computations must be performed stage by stage, neglecting the transient effects induced by the jacking and ballast operations. During the deck mass transfer, the contact loads are not included. Built on the COB-PI experience, it was decided...

... Abstract Computer simulations and model tests have been used to design and optimize the hydrodynamic performance of a Deep Water Drilling Vessel operating under full DP. The paper describes the procedure used to investigate the thruster-hull and thruster-thruster interaction and the automatic...

... Abstract With the increase in knowledge in computer-based simulation methods and recent advances in high-speed computing, solutions to complex fluid-structure interaction problems, such as transient wave impact on fixed and floating structures, can now be studied in more detail. Numerical...

... for shallower water depth applications. To improve the understanding of and the insight in the reliability and integrity in the application in the deep water mooring systems, numerical design tools can be used. As the numerical design tool a by model tests validated computer program based on the fully...

... of the East Sea Korea. Various pre-processing steps for the estimation included static correction for gun delay, geometric correction data interpolation and Fourier transform. Based on the constant Q model, quality factor was computed for the upper-most layer within the basement using the spectral-ratio...

... is to compute D,,, the steady statefatigue damage rate that results from wind at the critical wind speed, V,, which causes maximum vibration response. This damage rate is then multiplied bythe fraction of the year that the wind is expected to blow at or near to thecritical velocity for that member. [n...

... into an international industry standard. Introduction A user friendly computer program called VAC (Voyage Acceleration Climate) was developed. The ship motion calculations are based on striptheory, using 2-D diffraction theory to solve the hydrodynamic potential per section. This makes the method applicable to all...

...) stated that 454 sub-sea pipelines were damaged during the storm. The report included preliminary estimates of the proximate causes of the damages but included no computations or detailed analysis of the various loads which were placed on the affected pipeline segments. The locations of damaged pipelines...

... computations of the coupled chain-mooring-tanker system the wave frequency (WF) and low frequency (LF) turret motions and chain/turret forces are simultaneously determined. The model tests were carried out on scale 82.5. The results of the computations are compared with the results of the model tests using...