Saarblitz, Wind farm in HDR,, creative commons by-nc-sa 2.0


Submitted by Anders Yde on August 24, 2015 - 2:00pm
Main hypothesis
HAWC2 consists of models describing the external effect, applied loads, structural dynamics and connection to the control system. The external effects models how the wind, waves and soil is expected to behave. The applied loads models how the external effects interact with the structure through aerodynamic, hydrodynamic and soil models. The structural formulation of HAWC2 is based on a multibody system. This enables a wide range of model capabilities and the possibility to include non-linear geometric effects. Wind turbine control is preformed through external DLL´s (Dynamic Link Library) that operates the system under different conditions.
Newmark beta solution scheme together with Newton-Raphson iterations within each time-step
Structural dynamics
Turbulence closure
Turbulence model
Mann turbulence generator (Fully coherent 3D-turbulence) , Able to read Veers turbulence model , RANS & LES by SFI (structure-fluid interaction) coupling to the CFD code EllipSys3D
Mooring lines
Structural dynamics
Added mass coefficient
Normal drag coefficient
Tangential drag coefficient
Seabed contact model
Seabed-line friction model
Wave kinematics
Wave theory
The wave kinematics are not calculated within the HAWC2 code, but provided externally through a defined DLL (Dynamic Link Library) interface, where the present open source DLL includes the water kinematics. The water kinematics includes : Currents, Linear airy waves, Irregular airy waves, Deterministic irregular waves, Stream function wave, Able to read pre-generated water kinematics
Free surface correction
Wheeler stretching method
Wave spectrum
JONSWAP and Pierson–Moskowitz spectrum

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