10 MW风力机复合材料叶片结构设计研究

Research on Structural Design of 10 MW Wind Turbine Composite Blade

以DTU 10 MW风力机叶片为研究对象,基于NX参数化建模的二次开发,快速建立风力机叶片三维壳体模型,并对其进行复合材料铺层设计。进一步采用计算流体力学方法获取叶片表面气动载荷,对其进行静力学、谐响应及稳定性分析,预测其发生屈曲的可能性及位置。结果表明:叶片在极限风速下有足够安全性,其最大应力位于主腹板附近,最大应变位于主梁中部;叶片发生共振时,挥舞方向有较大幅度波动,摆振方向及叶片展向仅有小幅波动,初次共振对叶片影响最大;叶片在额定风速下未发生整体屈曲现象,仅在叶片背风面副梁帽处出现局部屈曲,增加该区域铺层材料厚度可改善此类现象。

The DTU 10 MW wind turbine blade is taken as the research object.The three-dimensional shell model of the wind turbine blade is quickly established and the composite layup design is carried out based on the secondary development of NX parametric modeling.The computational fluid dynamics method is used to obtain the blade surface aerodynamic load.The static,harmonic response and stability analysis is carried out and the possibility and location of the blade buckling are predicted.The results show that the wind turbine blade has sufficient safety at the extreme wind speed.The maximum stress of the blade is located near the main web and the maximum strain is located in the middle of the main beam.When the blade resonates,the flap-wise direction fluctuates greatly,while the shimmy direction and blade span fluctuate only slightly.The primary resonance has the greatest influence on the blade.The overall buckling of the blade does not occur at the rated wind speed,and only partial buckling occurs at the leeward side of the blade,which can be improved by increasing the thickness of the lamination material in this area.