摘要
为分析风力机叶片在旋转时的振动频率,采用刚-柔耦合一次近似模型,并考虑离心刚化效应,推导叶片在旋转时的动力学方程,并给出叶片的刚度和质量矩阵的表达式。最后,计算某风力机叶片在不同转速和不同轮毂半径下的振动频率。计算结果表明,一次近似模型中的刚-柔耦合效应对叶片旋转时的各阶振动频率均有较大影响。研究结果对风力机叶片的动力学设计具有一定参考价值。
To analyze the vibrational frequencies of wind turbine blades under rotation condition,the first order approximation model was adopted and the centrifugal stiffening effect was included to derive the dynamic equation of the rotating blade.The formula of stiffness matrix and mass matrix were given in this paper.Finally,the vibrational frequency of a wind turbine blade was calculated with the different rotation speed and different radius of hub.The results show that the rigid-flexible coupling effect in the first order approximation model has great effects on the vibrational frequencies of rotating blades.The results of the paper have some reference value to the dynamic design of wind turbine blades.
作者
高凯强
张志强
李爱群
Gao Kaiqiang;Zhang Zhiqiang;Li Aiqun(School of Civil Engineering,Southeast University,Nanjing 210096,China;Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第4期1120-1124,共5页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51438002)
江苏省产学研前瞻项目(BY2016076-11)
关键词
叶片频率
有限元法
耦合模型
一次近似理论
离心刚化效应
blade frequencies
finite element method
coupled model
first order approximation theory
centrifugal stiffening effect
