The main column is located at the center of the platform and supports the tower. The semi-submersible platform includes a main column and three offset columns. Paterson,b 1Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24060, USA Abstract. The OC4 semi-submersible FOWT supports a NREL 5 MW reference offshore wind turbine in 200 m water depth. Also tension of the mooring line at fairlead and tower base loads are increased accordingly in all sea conditions under investigation. 2015 Numerical study of interactions between phase II of OC4 wind turbine and its semi-submersible floating support system, J. A study of wave forces on an offshore platform by direct CFD and Morison equation D. simulation of FOWTs using three codes: BLADED, FAST, and OrcaFlex. At the same time, slow-drift force has larger effect than mean drift force. buoy, the MIT/NREL TLP, and the OC4-DeepCwind semisubmersible were compared. Results show that second order mean drift force and slow-drift force will drift the floater away along wave propagation direction. DeepCwind consortium in 2013 at the Maritime Research Institute Netherlands (MARIN) offshore wave basin. Two time-domain solvers, SIMA (SIMO/RIFLEX/AERODYN) and FAST are being chosen to analyze the global response of the integrated coupled system under small, moderate and severe sea condition. The system is a floating semisubmersible, tested by the. This approach considers floating wind turbine as an integrated coupled system. Morison model is utilized to account the viscous effect from fluid. Validation against wave tank experiments OO-Star Semisubmersible. The effects of the wind turbine are neglected. Second order potential theory is being used for computing linear and nonlinear wave effects, including first order wave force, mean drift force and slow-drift excitation loads. OC4 Space-Frame В«JacketВ» C2C, IEA OC4 Semi-Submersible. The OC4-DeepCwind semi-submersible analyzed in the International Energy Agency (IEA) Wind Task 30 project is used for this study 6. The emphasis of this paper is to investigate how the wave mean drift force and slow-drift wave excitation load (Quadratic transfer function, namely QTF) influence the platform motions, mooring line tension and tower base bending moments. This paper presents an integrated analysis about dynamic performance of a Floating Offshore Wind Turbine (FOWT) OC4 DeepCwind with semi-submersible platform under real sea environment.

Orcaflex oc4 semi-submersible