Study on Hydrodynamic Characteristics of Wind Turbine Monopile under Nonlinear Wave

As wind power technologies become maturer, the monopile foundation of offshore turbine is widely used because its simple structure, few occupied space and low cost. However, under severe sea conditions, impact nonlinear wave load applied against on system structure safety cannot be ignored. In this paper, 5MW National Renewable Energy Laboratory (NREL) was taken as research object, computational fluid analysis software ‘STARCCM +’ to study hydrodynamic characteristics different parameters. This paper mainly analyzed upper wave, pressure forces around same period heights. And force calculated by CFD compared with result based potential flow theory. The results showed that rise height, increase continuously, second-peak phenomenon appeared at some measuring points water surface foundation. Because method considers viscosity more in line real it accurate obtain method.