Simulation Design And Vibration Suppression Control Of Wind Turbine Blades In Beibu Gulf Sea Area

Offshore wind power can provide clean energy to the country and is an effective way to achieve carbon neutrality.Leaf is one of the key components of wind turbine,accounting for about 20% of the whole machine cost.The vibration damage under load is a common failure of wind turbine.Although China's Beibu Gulf sea area has the resource conditions to develop offshore wind power,the sea area is currently in the exploration period of offshore wind power,and no related projects have been implemented.Since the fan blades are often specially designed for specific sea areas,the existing fan blades may not be applicable to the wind conditions in the Beibu Gulf waters.Based on the exploratory development of offshore wind power in the Beibu Gulf sea area,the wind resources conditions are analyzed and studied to provide wind condition data support for the leaf design.Based on the average annual wind velocity of the area,the aerodynamic properties of different airfoil were analyzed by Fluent.Combined with the characteristics of wind conditions,air pressure and average annual temperature in the Beibu Gulf sea area,the aerodynamic shape design and structural design of the leaves were conducted,and the airfoil design software and 3D modeling software were used to complete the wind wheel modeling.Under the most annual typhoon wind conditions of 18m/s and the most frequent typhoon wind speed 52.2m/s of 30 years,the aerodynamic analysis and structural analysis were conducted.The simulation results show that the blade model has good aerodynamic performance and high structural strength.For the current situation of blade vibration control,According to the additional damping structure of the damping layer of the blade,Wind load model was established by Matlab,Wind loads were imported into Ansys for transient dynamics simulation analysis of the leaves,Simulation results show that,under a random variable load,The maximum displacement of the leaf tip decreases in all three inhibitory structures,The built-in constraint damping structure is reduced by 36.21% and 18.23% than the maximum tip displacement of the remaining two inhibitory structures,respectively,The standard deviation was reduced by 9.2% and 4.52%.Finally,the vibration test experimental platform was built,a small low-speed axial flow wind tunnel was designed and produced,and the simulation results of vibration suppression were verified.From the test,the built-in constraint damping structure was the highest,and the vibration suppression rate under 6.5m/s?7.5m/s wind speed reached 54.62% and47.52% respectively,which verified the correctness of the simulation.