The vibration of offshore wind turbines supported by bucket foundations under operational conditions is influenced by aerodynamic damping generated by the rotation of the turbine blades.However,current numerical simulation methods have limitations in accurately representing and incorporating the effect of aerodynamic forces on vibration,leading to deviations from actual project conditions.To address these issues,this paper focuses on a complete cylindrical foundation machine in an offshore wind farm,considering the impact of aerodynamic damping.A simplified theoretical model of downwind vibration is developed,and the reduction effect of aerodynamic damping on machine vibration under operational conditions is studied.The reduction coefficient is introduced into the numerical model calculations and compared with prototype observation results.The findings indicate that the difference in first-order natural frequencies between the theoretical and numerical models is small,demonstrating their applicability to practical projects.The vibration difference between the two models remains stable at the same wind speed,indicating good synchronization in dynamics.Under shutdown and operation conditions,the average error between the root mean square value of simulated tower drum vibration displacement and prototype observation is 12.19%and 7.99%,respectively.This demonstrates the feasibility of reducing numerical simulation results based on the theoretical model considering aerodynamic damping,with simulation accuracy meeting engineering requirements.
offshore wind powerbucket foundationfinite element modelsaerodynamic dampingprototype observation
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