摘要
为了研究截面翘曲对大型风力机叶片弯扭耦合特性的影响,分别建立考虑翘曲效应和不考虑翘曲效应的梁模型,并对叶根截面、翼型截面特性进行了计算,表明考虑翘曲效应的梁模型在计算叶片截面刚度时得到的结果更准确。采用考虑翘曲效应的方法计算了5 MW风力机叶片的截面刚度,分析了叶片梁帽铺层角度对风力机叶片弯扭耦合特性的影响。结果表明,无论是否考虑翘曲效应,获得最大弯扭耦合特性的梁帽铺层角度都为20°;在同样的梁帽铺层角度下,翘曲效应对叶片不同部位(特别是在翼型过渡区域及气动翼型区域)的弯扭耦合系数影响很大。
In order to study the effects of sectional warping on bend-twist coupling characteristics of large-scale wind turbine blade, sectional properties of roots and airfoil sections are calculated in beam model with considering warping effect or not, the results show that the beam model that considers warping effect is more accurate. Sectional stiffness of 5 MW wind turbine blade considering warping effect is calculated, spar cap＇s ply orientation effects on bend-twist coupling properties is analyzed.The results show that whether or not considering the sectional warping, only the ply orientation of spar cap is 20 degree, observable bend-twist coupling properties will be gotten; under the same ply orientation, the warping has great effects on bend-twist coupling properties at different parts of the blade especially in the region of transition airfoil and airfoils.
出处
《可再生能源》
CAS
北大核心
2015年第2期238-243,共6页
Renewable Energy Resources
基金
河北省自然科学基金资助项目(E2013502291)
中央高校基本科研业务费专项资金资助项目(13MS82
2014ZD33)
关键词
弯扭耦合
梁模型
翘曲效应
截面特性
bend-twist coupling
beam model
warping effect
section property
