Analysis of Structural Dynamic Response of Offshore Wind Turbine Under Combined Wind-Ice Action
In order to study the structural dynamics of offshore wind turbines under different environmental loads,a turbulent three-dimensional wind field with an average wind speed of 12 m/s is established based on a 5MW offshore wind turbine using the Kaimal wind speed spectrum,and the dynamics of the offshore wind turbine under different working conditions are calculated in the integrated analysis software OpenFAST.The simulation results show that the transverse and longitudinal moment displacements of the tower base of the wind turbine are larger than those of the tower base under the single-loading condition under the combined wind and ice conditions.The lateral displacement of the platform is much larger than the longitudinal displacement of the platform,and the longitudinal bending moment of the wind turbine is mainly affected by the turbulent wind.The fatigue damage values obtained by the superposition calculation of the DNV method are larger than the results obtained by the combined wind and ice action.
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