Time Domain Coupled Analysis and Load Transfer for Floating Wind Turbine Structures

A time domain coupled analysis and load transfer for floating wind turbine type structures is demonstrated in this paper. Hydrodynamic coefficients are first sent to a time domain solver for coupled analysis including mooring lines and wind turbine. The wave, motions of the structure and auxiliary forces from mooring lines and wind turbine are sent back to a time domain Rankine source solver to transfer the loads to structural model before the time domain structural analysis and fatigue analysis. A converter program is applied between two solvers to get correct transformations of the wave, motions and forces. Special emphasis has been put on investigation of the consistency of the data transfer. The whole analysis procedure is straightforward and can be applied for other similar structures.