Calculation And Analysis Of Fluid-structure Coupling Of Offshore Wind Turbines

With the advancement of society and the improvement of people's material level,the issue of energy consumption has become increasingly prominent.Therefore,clean power generation methods such as wind power generation have become the key areas that countries around the world are striving to develop.The key components of wind turbines are blades,towers and foundations,which performance will directly affect their overall efficiency and safety.But at present it is only for its local research,such as blades,towers,etc.This paper discusses and studies the coupling of wind turbines under conditions of operation and extreme conditions.In-depth understanding of the basic structure of offshore wind turbines,familiar with the optimization of blade aerodynamic performance and learning methods of learning.Under the condition of known fan blade design parameters,the aerodynamic performance of the blade was optimized by using the Glauert method and the Wilson method.The aerodynamic performance of the blade is calculated based on leaf momentum theory,and then the relationship between the wind energy utilization coefficient and the tip speed ratio is calculated.By contrast,the advantage of Wilson's method is obtained.The Profili airfoil database was then used to obtain two-dimensional airfoil data suitable for this sea state and good aerodynamic performance.The spatial coordinates of the wind turbine blade were obtained by the data processing software EXCEL,and the space coordinates were imported into the software CATIA for solid modeling.Thus,the actual space model of the blade was obtained,and the tower and the basic space modeling were completed.The fluid-solid coupling simulation analysis was performed on the entire fan.In this paper,the fluid-solid coupling method is used to implement the wind load loading of the offshore wind turbine as a whole through the software AQWA for the overall hydrodynamic loading of the fan and the software CFX to use the one-way fluid-solid coupling.Combined with Mindlin equation and half-space theory to complete the pile-soil simulation,the fluid-structure interaction simulation of the entire offshore fan system was completed.The external loads received by each part of the wind turbine are loaded on the wind turbine as a whole,and the equivalent stress and total deformation of the wind turbine are calculated.Comparing the ultimate stress and deformation of the material used in the wind turbine,the results were analyzed,which can meet the actual project.It provides a more comprehensive proposal and analysis method for the construction of offshore wind farms in China.