... floats, two configurations of wire rope mooring systems and various membrane pre-tensions were simulated in the time domain. The mooring response and elastic behavior of the structure under various environmental load such as current and wave were also investigated. The wind loading is neglected...

... a jump start in the readiness of floating wind technologies. Compared with bottom-fixed offshore wind turbines, semi-submersible FOWT has many advantages, among different floater types, in economic efficiency as offshore wind farms go to deeper water. This paper summarizes the design of a mooring system...

... Abstract Within this paper, an approach to monitoring the rotational performance of weathervaning systems is proposed, by mainly looking at the so-called release events : the maximum rotation (or break-out angle) of the geostationary side of the turret, where the mooring yaw stiffness...

... Abstract This paper investigates the moment loading and heading response of a turret-moored vessel subjected to surface currents using two-dimensional Computational Fluid Dynamics. To investigate the hydrodynamic loads on the vessel, the moment load was first calculated when the vessel was held...

... Abstract Recent runout accidents of GPS buoy demand more robust mooring system in harsh environment. The mooring with steep wave configuration formed by intermediate buoys could be a candidate of the robust mooring system. However, the steep wave mooring (SWM) could have some risk...

... and includes cracks, dents from wave actions, anchor impact on structures, horizontal and vertical wave impacts and ship collisions. In addition, failure of the dynamic position keeping system, mooring system breakage and incidents related to stability and ballasting have been reported. The paper provides...

... Abstract DNV is currently running a Joint Industry Project, “NorMoor JIP”, which is now approaching the end of phase 3. In this phase the fatigue limit state (FLS) of mooring line studless chains for permanent units has got the main attention. Phases 1 and 2 covered the ultimate (ULS...

... Abstract Fatigue damage assessment of mooring lines components is one of the main issues in the design and life extension monitoring of deepwater floating production units mooring systems. Floating units operating at several ocean regions, as in the Brazilian southeast coast and Africa west...

... engineer’s toolbox. Two decades ago, model tests were performed on a seemingly simple geometry in the form of a rectangular barge with horizontal skirts fitted at its keel. The hull was held in place via a soft horizontal mooring system for simplicity and with a view to concentrating on the hydrodynamics...

..., such as floater concepts (spar, semi-submersible, tension leg platform, etc) and their mooring system designs. This paper focuses on the mooring designs for FOWTs by leveraging the extensive experience gained from the offshore oil & gas industry. Similarities and differences are highlighted in design criteria...

... Abstract Analytical, experimental and computational models have historically been heavily simplified, linearized, and otherwise reduced. This paper shows how such model reductions eliminate the fundamental geometric changes that determine real behavior in cables, strings, moorings, guys...

... Abstract Mooring is one of the key components of a floating offshore wind turbine since the mooring rupture may lead to the total loss of one or even several turbines in a farm. Even if a large experience in moorings of floating bodies was gained in the oil & gas industry, the renewable...

..., an aerodynamic software package for wind turbine analysis with the ability to be coupled with the hydrodynamic model. Due to the canted columns, a nonlinear analysis was performed using the coupled numerical hydrodynamic model of the platform with mooring system in extreme sea states. PyraWind FOWT...

... Abstract We report on a multi-year investigation into mechanisms of fatigue, corrosion, and abrasion on floating offshore wind turbine (FOWT) mooring systems funded by the U.S. Bureau of Safety and Environmental Enforcement (BSEE). The project team examined the efficacy of standards-based...

... Abstract This paper describes the development of data-driven models for the prediction of mooring line tensions by separating the low- and wave-frequency components of the tensions, such that the former is approximated as quasi-static tensions while the latter is predicted using ANN models...

...-order diffraction/radiation analysis. The importance of including viscous damping in heave, roll and pitch is illustrated for the mean wave-drift force in surge and sway. FPSO motions and mooring line tensions from fully-coupled time-domain analysis in OrcaFlex is compared when using approximated QTFs...

... Abstract This paper aims to perform a time-domain mooring fatigue analysis for a Spar-type floating offshore wind turbine operated in the South China Sea. Tension ranges of mooring lines are achieved from a hydrodynamic analysis where the effects of wind, wave and current are considered...

... turret green water mooring heading control stability ballasting collisions and offloading IN SERVICE EXPERIENCES WITH SHIP-SHAPED FLOATING PRODUCTION UNITS Marita Halsne1, Narve Oma, Gerhard Ersdal, Arne Kvitrud, Roger L. Leonhardsen, Morten Langøy, Terje Andersen, Lars G. Bjørheim Petroleum...

... data from five moorings deployed between 2015 and 2018 by the Barents Sea Metocean and Ice Network (BASMIN) Joint Industry Project. The study shows that the existing FOAM forecasts produce adequate results in the Barents Sea. However, while studies have shown the assimilation of CryoSat-2 data...

... Abstract The way polyester ropes change their length in response to tension is often represented using a static-dynamic model with parameters for dual linear stiffness, based on testing according to defined procedures. This may not be sufficient for the mooring analysis since the stretch...