Currently, floating wind turbine may be the most economical and suitable equipment to exploit offshore wind energy in deep water. According to the environmental conditions which are as same as OC3-Hywind (NREL), a new 5MW offshore wind turbine on a multi-column TLP foundation (Windstar TLP) is proposed. The general arrangement, main structure and mooring system are also designed. Aero-hydro-servo-elastic coupled analysis based on IEC-61400-3 requirements is carried out in the time domain with the numerical tool FAST. Statistics of the key parameters are obtained and analyzed. It is shown that the design requirements are satisfied. The new concept holds potential for further development.

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