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1. #ORCAFLEX OC4 SEMI SUBMERSIBLE SOFTWARE#
2. #ORCAFLEX OC4 SEMI SUBMERSIBLE CODE#
3. #ORCAFLEX OC4 SEMI SUBMERSIBLE SIMULATOR#

Index no index present Literary form non fiction Nature of contents Electronic government information - United StatesĬataloging source GPO Robertson, A Government publication federal national government publication Illustrations.Semi-submersible offshore structures - United States - Testing.Offshore wind power plants - United States.Government publications - United States.National Renewable Energy Laboratory (U.S.).The results highlight practical differences between the models in terms of both loads prediction and simulation stability/consistency.Label Definition of the semisubmersible floating system for phase II of OC4 Title Definition of the semisubmersible floating system for phase II of OC4 Statement of responsibility A. Additionally, coupled floating wind turbine simulations using the OC4-DeepCwind semisubmersible show how the friction models affect the platform global response and the extreme and fatigue mooring loads.

#ORCAFLEX OC4 SEMI SUBMERSIBLE SIMULATOR#

Both friction models have been implemented into the MoorDyn mooring dynamics simulator and tested under a set of prescribed scenarios including snap loads and oscillatory motion, where the fairlead of a mooring line was driven along both linear and circular paths. This model differentiates between static and kinetic friction, where the former is dependent upon the forces acting on the line and the latter is a function of seabed’s normal response. To assess the impact of this friction model’s use, we compare it against a more sophisticated friction model. Current implementations typically represent seabed contact as coulombic friction with ramping near zero velocity to mitigate instability in the numerical time integration. Most mooring models include a relatively simple seabed friction formulation, if any, and little examination of their accuracy is available in literature. Seabed friction can play an important role in the determination of mooring loads of slack-moored floating offshore wind turbines. This paper explores the impact of friction models on mooring line simulations.

#ORCAFLEX OC4 SEMI SUBMERSIBLE CODE#

1 A simulator coupling NRELs code FAST and OrcaFlex. Catenary (a) and taut (b) mooring arrangement a classic offshore platform, after Vryhof (2010).

#ORCAFLEX OC4 SEMI SUBMERSIBLE SOFTWARE#

the commercial software Orcaflex is used to simulate the motion behavior of the OC4 floating platform, and the floater stability and mooring line tension after the mooring system. (2013) for a MW-sized HAWT on a small semi-submersible Fig.

Journal of Micro and Nano-Manufacturing Floating offshore wind platforms can be classified into main three types: spar buoy, semi-submersible, tension-leg platform (TLP) according to reaching stability.Journal of Manufacturing Science and Engineering.Journal of Engineering Materials and Technology.Journal of Engineering for Sustainable Buildings and Cities.Journal of Engineering for Gas Turbines and Power Diameter of base columns 24 m Diameter of pontoons and cross braces 1.6 m OC4 PHASE II OVERVIEW Platform mass, including ballast 1.3473E+7 kg Semisubmersible Description Platform CM location below SWL 13.46 m Phase II of the OC4 project involved the modeling of a 2 Platform roll inertia about CM 6.827E+9 kg-m semisubmersible floating offshore.

Journal of Computing and Information Science in Engineering.Journal of Computational and Nonlinear Dynamics.Journal of Autonomous Vehicles and Systems.ASME Letters in Dynamic Systems and Control.ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems, Part B: Mechanical Engineering.Mechanical Engineering Magazine Select Articles.