主梁腹板偏置及复合材料铺层的大型风力机叶片结构性能分析  

Structural Performance Analysis of Large Wind Turbine Blade Based on Main Beam Web Offset and Composite Layup

作　　者：王海生[1] 缪维跑 李春[1] 李志昊 岳敏楠 朱海波 WANG Haisheng;MIAO Weipao;LI Chun;LI Zhihao;YUE Minnan;ZHU Haibo(School of Energy and Power Engineering(Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering),Yangpu District,Shanghai 200093,China)

机构地区：[1]上海市动力工程多相流动与传热重点实验室(上海理工大学),上海市杨浦区200093

出　　处：《中国电机工程学报》2023年第19期7509-7518,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51976131,52006148,52106262)。

摘　　要：为研究大型风力机叶片内部结构偏转及表面偏轴蒙皮纤维共同作用下的叶片结构性能,基于NX二次开发建立NREL5MW叶片CAD模型,通过CFD方法求解叶片气动载荷,结合有限元方法对其进行模态、静力学及屈曲稳定性计算。结果表明:各叶片一阶固有频率均有下降,腹板偏转角θ对叶片模态影响高于纤维偏转角α;在气动载荷作用下,叶尖最大形变量均大于传统叶片;叶片最大应力位于近叶根最大弦长处,叶片表面应力随偏转腹板角θ增加而增大,且θ>0叶片均大于θ<0叶片;θ<0叶片易屈曲失稳区域于前段气动区,而θ<0位于近叶根区靠近前缘处,同一偏转角度下,θ<0叶片一阶屈曲因子均大于θ>0叶片,抗屈曲能力较好;综合分析,θ=-15°,α=15°叶片模态降幅小,屈曲因子增幅及表面应力降幅较为显著,降低叶片结构应力效果良好。In order to study the structural performance of large wind turbine blades under the combined effect of internal structural and skin fibers deflection,a CAD model of NREL 5MW blade is established based on NX secondary development.The aerodynamic loads of the blade are solved by CFD method.The blade model is analyzed by modal,static and buckling by using the finite element method.The results show that:the first-order natural frequency of blades has decreased,the influence of web deflection angleqon the blade mode is higher than fiber deflection anglea;under the action of aerodynamic load,the maximum deformation of blade tip is greater than traditional blade;the maximum stress of the blade is located near of the maximum chord,the stress increases with increasing of the deflection web angle q,andq>0 blade is greater thanq<0 blade;q<0 blade instability region is in the front section of the aerodynamic zone,whileq<0 is located near the blade root leading edge;with the same deflection angle,q<0 blade first-order buckling factor is greater thanq>0 and is buckling resistance.Comprehensive analysis shows that,q=-15°,a=15°blade modal drop is small,buckling factor increases and surface structure stress drop is more significant.

关 键 词：风力机叶片 弯扭耦合特性 复合材料 结构-材料耦合 屈曲分析 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]