工字梁结构对双腹板预弯叶片变形量影响的研究  

Study on Influence of I-beam Structure on Prebend Blade Shape Variable of Double Web

作　　者：杨瑞[1,2] 赵九桥 马小川 YANG Rui;ZHAO Jiu-qiao;MA Xiao-chuan(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Gansu Wind Turbine Engineering Technology Center,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]甘肃省风力机工程技术中心,甘肃兰州730050

出　　处：《液压气动与密封》2023年第6期39-45,共7页Hydraulics Pneumatics & Seals

基　　金：国家国际科技合作专项项目(2014DFR60990);国家自然科学基金(51565028,51965034)。

摘　　要：为减少风力机叶片在额定工况下的叶尖形变量,提高叶片抗弯性能,增加机组安全性,借鉴工字梁理论对风力机叶片腹板进行加强,以某1.5 MW风力机叶片腹板为研究对象,建立了一种工字梁腹板结构,共计6组,并与原叶片在相同的力学模型下进行对比。使用APDL软件进行了叶片的模态分析及静力学分析,比较了原叶片与工字梁叶片的模态振型、振动频率及叶尖最大位移等力学性能。模态分析表明,工字梁腹板叶片比原叶片的一阶位移下降了3.34%,一阶频率降低了3.24%,总体均高于共振频率;静力学分析表明,工字梁腹板叶片比原叶片叶尖位移最多降低了6.38%,具有更高的抗弯性能,在叶片结构设计中可进一步减少预弯。In order to reduce the displacement of the wind blade tip and improve the safety of the unit under the rated working condition,a theory of the abdomen of a 1.5 MW wind blade is used.A structure of I-beam web was established using finite element method for 6 groups,and compared with the original blade under the same mechanical model.Modal analysis and static analysis were performed using APDL software,and the mechanical properties of modal vibration,vibration frequency and maximum displacement of the original blade and I-beam blade were compared.The modal analysis show that the first order displacement of the I-beam blade decreased by 3.34%over the original blade;the first order frequency by 3.24%,overall above the resonance frequency.Static analysis show that the displacement of the tip of the blade of the I-beam blade decreased by 6.38%over the original blade,with higher bending resistance,which can further reduce the pre-bending design.

关 键 词：风力机叶片 工字梁腹板 叶尖位移 抗弯性能 有限元分析 

分 类 号：TH138[机械工程—机械制造及自动化] TK83[动力工程及工程热物理—流体机械及工程]