by which software, we can calculate the mooring load of floating offshore wind turbines?
Dear Mohammad,
I recommend you to check the following paper, and the more recent papers citing it: J. M. Jonkman and D. Matha, Dynamics of offshore floating wind turbines—analysis of three concepts, Wind Energ. 2011; 14:557–569, doi: 10.1002/we.442
There you can find the following:
"1.2. Simulation tool capabilities
This work applies the NREL-developed FAST servo-elastic tool,6 fully coupled with the AeroDyn rotor aerodynamics module7 and HydroDyn platform hydrodynamics module3,4 to enable coupled nonlinear aero-hydro-servo-elastic analysis in the time domain. Turbulent wind inflow is prescribed by the external computer program TurbSim.8 FAST and AeroDyn combined account for the applied aerodynamic and gravitational loads, the behavior of the control and protection systems and the structural dynamics of the wind turbine. The latter contribution includes the elasticity of the rotor and tower, along with the elastic coupling between their motions and the motions of the support platform. Nonlinear restoring loads from the mooring system are obtained from a quasi-static mooring line module that accounts for the elastic stretching of an array of homogenous taut or slack catenary lines with seabed interaction. The HydroDyn platform hydrodynamics module accounts for linear hydrostatic restoring; nonlinear viscous drag from incident wave kinematics, sea currents and platform motion; the added-mass and damping contributions from linear wave radiation, including free-surface memory effects; and the incident wave excitation from linear diffraction in regular or irregular seas. HydroDyn requires as input hydrodynamic coefficients, including the frequency domain hydrodynamic-added mass and hydrodynamic-damping matrices and wave excitation force vector. In this work, these hydrodynamic coefficients were generated using WAMIT,9 which uses the three-dimensional numerical panel method to solve the linearized hydrodynamic radiation and diffraction problems for the interaction of surface waves with offshore platforms in the frequency domain"
Other interesting references might be:
Dear Jose Ignacio Rojas Gregorio
Best software for cfd is ansys Fluent, Solidworks flow simulation with my knowledge .
Regards
Bala K
Well, sure, you can simulate an increadible amount of phenomena (including probably the behavior of the offshore turbine) with multiphysics softwate like COMSOL, ANSYS, SolidWorks, Inventor, etc., but it may require much more time to set up your model, much higher computational respurces or much longer computational times, etc., while the software I mention (FAST servo-elastic tool coupled with AeroDyn rotor aerodynamics module and HydroDyn platform hydrodynamics module) was developed ad hoc for solving this specific problem, and requires less resources.
Jose Ignacio Rojas Gregorio Balasaravanan Karthikeyan Best regards
Hi, if you'd like to add some consideration into mooring load estimations, you would also need to select a model for the estimation of loads. FAST offers quasi-static and dynamic solutions (finite elements). Try to pick a finite element dynamic model since you may be underestimating loads in larger motions with a quasi static model. If you're interested, you can find a comparison of mooring line models on one of my articles.
On the model uncertainty of wave induced platform motions and mooring loads of a semisubmersible based wind turbine
January 2018Ocean Engineering 148:277-285
DOI: 10.1016/j.oceaneng.2017.11.001
Hi, here follows a list of codes that I have gathered over the years:
- AeroDyn
- ADDAMS
- Code Aster (structural solver) [EDF. (2019). Code Aster]
- FAST
- GiD (UPC-proprietary package) [CIMNE. (2019). GiD]
- Kratos (open source multi-physics solver) [Davdand, P., & Rossi, R. (2016). Kratos Multi-physics. International Centre for Numerical Methods in Engineering (CIMNE)]
- OpenFAST (open source wind turbines multi-physics simulation tool) [Jonkman, J., & Jonkman, B. (2019). OpenFAST v8. https://github.com/openfast]
- OpenFOAM (open source) [OpenCFD_Ltd. (2004)]
- QBlade (open source)
- Samcef 4 Wind Turbines (commercial)
Hope it is useful,
Jose
- FAST https://nwtc.nrel.gov/FAST
- OpenFAST https://nwtc.nrel.gov/OpenFAST
Please check SIMA (developed by SINTEF Ocean) and distributed as part of DNV GLs Sesam package: https://www.dnvgl.com/Images/Sesam-Wind-Integrated-analysis-of-floating-wind-turbine-whitepaper_tcm8-124150.pdf
FLEXCOM also does the job: https://www.woodplc.com/capabilities/digital-and-technology/software,-applications-and-analytics/flexcom
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