OrcaFlex includes a facility to
specify data in a user-defined function which we refer to as External Functions.
The feature is documented in the OrcaFlex and OrcFxAPI help files. Some example external
functions are supplied on the OrcaFlex installation disc. Alternatively these example
functions, together with full documentation, can be downloaded here:
FAST is a wind turbine modelling program developed by the US National Renewable Energy Laboratory (NREL). FASTlink is an experimental package that can be used to run coupled OrcaFlex + FAST simulations of floating wind turbine systems. In such coupled simulations FAST models the turbine aerodynamic loads and response, and the turbine control and power take-off system, but OrcaFlex models the platform hydrodynamic loads and mooring loads and response. To use FASTlink you need to have OrcaFlex 9.8a (or later) installed.