摘要
针对基于风能成本得到兆瓦级风力机不同厚度叶片的动态特性问题,考虑离心动力刚化、风剪切耦合影响,利用ANSYS软件对三种叶片模型进行动态特性分析.比较不同厚度叶片在常运行风速U0=10m/s时的动态响应情况.研究表明,离心动力刚化对不同厚度叶片固有频率产生较大影响;在低阶情况下,随着叶片厚度增加,其同阶固有频率增加;不同厚度叶片在同阶固有频率附近处位移响应振幅不同.风力机叶片动态特性的研究为工程人员合理设计不同厚度的叶片结构提供了一定的理论依据.
In order to study the influence of dynamic characteristics with different thickness MW blade based on wind energy-cost, three blade models were analyzed about dynamic characteristics by ANSYS with consideration for effect of centrifugal dynamic stiffening and wind shear. Dynamic response results of different blade thickness were compared at regular running wind speed U0 = 10 m/s. The results showed that natural frequency was greatly influenced by centrifugal dynamic stiffening; In lower steps, the natural frequency was increased with the increase of blade thickness; Different thickness blades had different displacement response nearby the natural frequency. The study of dynamic characteristics about wind turbine blade provides a theoretical basis for engineers to design a reasonable constructure of different thickness blade.
出处
《浙江工业大学学报》
CAS
2013年第4期364-368,共5页
Journal of Zhejiang University of Technology
基金
国家自然科学基金资助项目(51075365)
关键词
厚度
离心动力刚化
风剪切
动态响应
thickness
centrifugal dynamic stiffening
wind shear
dynamic response
