On the Development of a Semi-Submersible Offshore Floating Platform and Mooring System for a 13.2 MW Wind Turbine

摘要

We present a study related to the development of a semi-submersible floating offshore platform and moooring system intended to support a very large 13.2 MW wind turbine in a water depth of 200 meters. This three-bladed horizontal-axis wind turbine with 100-m blades (specifically, the SNL100-02 advanced core material design) is the subject of this study. Methodologies applied in the development of models for the tower, platform and mooring system are presented. An optimal size of the platform is sought through an iterative design scheme under various design constraints. The system's static stability is demonstrated through free-decay simulations in FAST; these are equivalent to free vibration studies on the system for arbitrary initial conditions of the platform. Global dynamic motions including the quasi-static (mean) response due to wind and waves as well as wave-frequency motions are studied. A comparison of the performance for different mooring patterns is undertaken and the behavior of the integrated system to various design load cases is studied.