The Effect Of Layer Parameters On The Performance Of Wind Turbine Blade Based On Response Surface Method

As the key component of wind turbine capturing wind energy,the blade is extremely complex on the force.Its structural performance and stability are the key factors that determine the normal operation of the wind turbine.The layup parameters determine the performance of the blades and there is a coupling effect between them.The article adopts response surface method and optimization method based on partial least squares method to study the many-for-one and many-for-many coupling effects of layering parameters on blade performance in order to obtain optimal combination of layer parameters for optimal blade performance,and then makes apply verification.The work done by the thesis is as follows:The response surface methodology,partial least square method,basic knowledge of composite laminates,strength and failure criteria of composites,and blade structure were described.A three-dimensional model of wind turbine blades was established.According to the classical laminate theory,the stiffness matrix of the laminates under different layup sequences is equivalent to the stiffness of the single laminates.The characterization parameters of stacking sequence are derived,and the mathematical relationship between layup order characterization parameters and equivalent parameters of laminate stiffness is established.Therefore,the sequence of layers is continuous.The layup angle,±X°layup thickness ratio,and stacking sequence were taken as independent variables,and the blade strength index(Tsai-wu failure factor)and stiffness index(maximum displacement U)were used as response variables.Based on response surface methodology,this article studies the coupling effects of layup parameters on the performance of wind turbine blade.The Box-Behnken test design method was used to design the layup parameters test scheme.The static strength and stiffness of the blade were simulated and analyzed.The centroid factor analysis was used to establish the many-for-one mapping relation between the layup parameters and the blade performance indicators.The variance analysis method tests the response surface model and the regression coefficient,and analyzes the macroscopic effects of single parameter and two-parameter coupling on the structural performance of the blade,and obtains the optimal value range of the layup parameters.On this basis,the Box-Behnken test design method was used to redefine the test plan,and the static strength and stiffness of the blade were analyzed.A multiple-to-one mathematical model of the layup parameters and blade performance was established by partial least-squares regression.The factor analysis method calculates the weight of each blade's performance and derives a multi-objective integrated decision model.The optimization and importance measurement analysis of the integrated decision model yields the optimized layup parameters and single parameter,and the overall impact ofthe interacting between the parameters on the structural performance of the blade.The numerical verification of the optimized layup parameters improves the performance of the blade,which verifies the feasibility and effectiveness of the method.The research results of this article provide a reference for the design and optimization of the structural plies for large composite fiber wind turbine blades.