- A numerical time-domain model was developed for the fully coupled dynamic analysis of an offshore floating wind turbine system including blade-rotor dynamics, mooring dynamics, and platform motions. The performance of the National Renewable Energy Laboratory mini-TLP-type system in a typical wind-wave condition was simulated and analyzed. In the present case, the dynamic coupling between the rotating blades and the floater was also considered in addition to the mooring-floater dynamic coupling. The rotor-floater coupling effects increased with blade size. The increased coupling effects tended to increase the dynamic tension on tethers especially in the high-frequency region. The significantly increased dynamic tension increased the maximum tension and also reduced its fatigue life by increasing both stress level and number of cycles. The developed technology and numerical tool were readily applicable to the design of new offshore floating wind farms planned in the future. This is an abstract of a paper presented at the Eighteenth International Offshore and Polar Engineering Conference (Vancouver, Canada 7/6-11/2008).