In this paper, three typical floating offshore wind turbines (FOWTs) were studied, with the generic 5MW wind turbine. The dynamic responses of three FOWTs are calculated in both frequency and time domain in operational and survival case under the same environmental conditions. During the calculation, the coupled load effects of aerodynamic and hydrodynamic loads are considered as well as the structure and mooring lines. By comparing the motions and mooring line tensions of three FOWTs to conclude that Semi-submersible shows better dynamic response and safer factor of strength of the mooring systems. And the sensitivities of three FOWTs to the environmental conditions as wave height and wind speed are also studied.

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