Projects Offshore Oil and Gas

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  Combined methodology for determination of wind and current coefficients

  The use of a CFD model validated by a short, dedicated model test campaign has become MARINTEK’s preferred approach for establishing accurate wind and current coefficients that are used in time-domain analysis of offshore structures. In addition to providing more insight into the involved physics, the validated CFD model enables us to obtain high-quality complementary data (damage conditions, alternative drafts ...) more rapidly and cheaply.

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  Breaking wave impact on a platform column

  In order to gain greater insight into the phenomenon of breaking waves slamming on the legs of large-volume offshore platforms, MARINTEK’s Wave Impact Load Joint Industry Project (JIP) has studied a long-crested breaking-wave impact on a rectangular cylinder with simplified deck structure.

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  Analysis of gap resonance problems by a hybrid method

  Gap problems refer to a class of hydrodynamic problems that include, for instance, the analysis of flow in moonpools, between ships in side-by-side configuration, and between a ship and a terminal. For all those problems, the coupled motions of the structure and of the entrapped fluid column, under various wave conditions, are decisive for operability assessments.

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  Wave-in-deck impacts

  The problem of wave-in-deck loading involves very complex physical mechanisms which demand close study, and experimental validation of the CFD setup used to examine this phenomenon is essential. MARINTEK’s Wave Impact Load Joint Industry Project (JIP) focused on an idealised model test setup of a rectangular block in regular waves. The CFD setup used to reproduce this phenomenon was validated against the measurements from a 2D model test setup and a simple potential theory-based method.

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  Qualification of risers for deep water

  MARINTEK has been highly active in research on vortex-induced oscillations of deepwater risers lately. Besides several numerical studies, we have performed extensive model tests in the Ocean Basin, in which advanced instrumentation, including fibre-optic instrument, was used to measure the response of various riser designs.

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  Verification of floating production systems for extreme weather conditions in the Norwegian Sea

  Floating production vessel mooring systems is among MARINTEK’s central topics of research. Under extreme weather conditions mooring lines are subjected to severe stresses, and there have been cases of failure of one or even several lines during severe storms. Failures of this sort suggest that the accuracy of the numerical analyses used in the mooring line design process ought to have been better.

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