Influencing Analysis On Properties Of Laminate Parameters To Composite Wind Turbine Blade And Its Structure Optimization Design

Wind energy as a renewable clean green energy, set the fastest growth rate in the fieldof global energy. Wind turbine blades are key components of capturing wind power,movement status and stress distribution is very complex, its reliable quality and superiorperformance is determinant to ensure that the wind turbine is normal and stable operation.Large-scale wind turbine blades composite laminated layer structure is complex, itsperformance changed with the different layer angle、layer sequence and layer thickness.Paper starting from the engineering practice, with a1.5MW wind turbines blade as anexample, research on influencing on properties of laminate parameters to composite windturbine blade, on this basis, carries out the structure optimization and intensity. The mainaccomplished work from paper is as follows:Discuss the basic principle of the composite laminated layer design and summarizedthe basic structure and marking method of the composite laminated layer. Wind turbineblade load is obtained by using the Bladed software simulation, and screening the load ofthe extremum.Based on the analysis of laminate composites of ABAQUS, the wind blade surfaceshall be processing into blocks. Then the blade each layer as uniform orthogonal variousheterogeneous materials.As simulation actually as blade layer structure, based on thislaminate scheme,3D shell model has been completed. Paper present according to thedistance block modeling and according to the glass composite cloth location blockmodeling two different types of Wind turbine blades modeling method, through thestructure simulation, comparative analysis the distribution of stress and strain, and showsthe maximum stress and maximum displacement show basic equal, then two modelingmethods are equivalent results.Through the example simulation, materials of wind turbine blade includeunidirectional、bias and triaxial. So explored the performance relationship between bias、triaxial and unidirectional. And receive that Bias[(±45°)] instead of two unidirectional [+45°/-45°] can improve the mechanical properties of components; The some thickness oftriaxial [(0°,±45°)] can replace the some thickness of unidirectional; The some thickness oftriaxial [(90°,±45°)] can replace the some thickness of unidirectional and improved performance. The some layers of triaxial [(90°,±45°)] replace the some layers ofunidirectional should be specific analysis.Design typical layer schemes of different layer angle、different layer sequence anddifferent layer thickness, through the structure simulation, analyzed the influencing onproperties of laminate parameters to composite wind turbine blade, found a macroscopicrule.According to the basic performance of unidirectional、bias and triaxial and influencingon properties of laminate parameters. Design four typical layer schemes, through thestructure simulation, determine the optimal layer scheme. Using Wu Tsai tensor theoryexplains the main layer material intensity, verified the rationality of structure design andsafety.