大型风力机新型弯扭耦合叶片结构特性分析  

STRUCTURAL CHARACTERISTIC ANALYSIS OF NEW TYPE BEND⁃TWIST COUPLING BLADES OF LARGE WIND TURBINE

作　　者：王海生 缪维跑 李春[1,2] 张立 朱海波[1] WANG HaiSheng;MIAO WeiPao;LI Chun;ZHANG Li;ZHU HaiBo(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《机械强度》2024年第3期668-674,共7页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51976131,52006148);上海市地方院校能力建设项目(19060502200)资助。

摘　　要：为研究新型弯扭耦合叶片结构性能,以NREL 5 MW风力机叶片为原型,应用NX Open Grip参数化语言建立叶片几何模型,并对其进行复合材料铺层设计,通过计算流体力学(Computational Fluid Dynamics,CFD)方法获得叶片气动力,将其映射至叶片有限元模型中,对叶片进行弯扭耦合特性、谐响应与强度分析。结果表明,叶片叶尖位移随腹板偏转角γ增加而增大;对于同一角度,γ>0叶片叶尖位移均小于γ<0叶片;γ为10°与15°叶片弯扭耦合效应最明显;较于传统叶片,弯扭耦合叶片2阶位移响应均有大幅下降;γ为15°叶片降低表面应力,具有良好的减载性能。In order to study the structural performance of the new bend⁃twist coupling blade,NREL 5 MW blade was taken as the prototype,and the geometric model of the blade was established by using NX Open Grip parameterization language.The composite lamination design was carried out in accordance with the real processing technology,and the aerodynamic force of the blade was obtained by the computational fluid dynamics(CFD)method.The bend⁃twist coupling characteristics,harmonic response and strength of conventional and bending⁃torsional coupling blades were analyzed respectively.The results show that the blade tip displacement increases with the increase of the web deflection.For the same angle,the blade tip displacement ofγ>0 blades was smaller than thatγ<0 blades.The bend⁃twist coupling effect is the most obvious whenγ=10°and 15°.Compared with the conventional blade,the second⁃order displacement responses of bend⁃twist coupling blades are significantly reduced.Theγ=15°blade can reduce the stress on the surface and has a good load reduction performance.

关 键 词：风力机叶片 参数化 结构特性 弯扭耦合 谐响应 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]