摘要
建立大型风力机叶片的三维有限元模型,在考虑旋转惯性力等外力因素下,分析和对比不同工况下叶片的振动频率,同时对叶片复合材料铺层角度和模态频率大小之间的关系进行研究。结果表明,叶片模态频率受应力刚化影响较大,通过改变叶片单向层的纤维铺层角可对旋转叶片的模态频率进行调整。
Wind turbine blade model is analysed based on finite element method. Research and comparison of blade natural frequencies is made in different rotational working conditions taking into account external factors such as the rotational inertia force. Also the relationship between the composite ply angle and natural frequency is analysed ton. The result shows that the nature frequency of large-scale wind turbine blade is influence greatly by the stress stiffening effect caused by the blade rotation. And the nature frequency of wind turbine blade can be designed by adjusting the single fiber layer ply angle of blade.
出处
《机械强度》
CAS
CSCD
北大核心
2014年第1期105-109,共5页
Journal of Mechanical Strength
关键词
风力机
复合材料叶片
模态频率
应力刚化铺层角度
Wind turbine
Composite blade
Nature frequency
Stress stiffening
Fiber layer angle
