Numerical Simulation of Dynamic Response of Offshore Wind Power Structures under Wind Wave Action
In order to make better use of marine resources and improve the efficiency of power generation,this ar-ticle put forward a numerical simulation method for the dynamic response of offshore wind structures in wind action.Firstly,the wave force balance equation was constructed to obtain the sea wave spectrum,and then the average wave height and period of the wind field were calculated.Secondly,the discrete frequency spectrum was used to approximate the random process of the target.Meanwhile,the mutual power spectral density matrix was used to solve the time-history curve of wind speed of the quasi-turbulent wind field.The mean wind speed and harmonic superim-posed wind speed were added together to obtain the wind load per unit height.According to the quasi-laminar wind-induced wave generation mechanism,a wave spectrum model was constructed,and then the wave load was calculated using the Morison formula.Based on the correlation between wind and wave,the wave parameters were substituted into the wind-wave spectrum to obtain a numerical response of the wind structure.The following conclusions can be drawn from the simulation results.If the wave surface height change is not considered,the wave surface force is undervalued at the wave crest and overestimated at the wave trough.In addition,the change of wave surface height will have a cer-tain impact on the dynamic response of the wind power structure.The results can provide a reference for ensuring en-ergy efficiency.
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