Modal Characteristics of Novel Wind Turbine Rotors with Hinged Structures

3rd International Conference on Mechanical and Aeronautical Engineering

机械制造;航空航天工程

Lu, Hongya^1 ; Zeng, Pan^2 ; Lei, Liping^2

Beijing Institute of Mechanical Equipment, No.50 Yongding Road, Haidian District, Beijing

100039, China^1

Key Laboratory for Advanced Material Processing Technology of MOE, Department of Mechanical Engineering, Tsinghua University, Beijing

100084, China^2

关键词: Dimensionless parameters;    Dynamic behaviours;    Influencing mechanisms;    Modal characteristics;    Modal frequency;    Novel techniques;    Vibration problem;    Wind turbine rotors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/326/1/012009/pdf
DOI  :  10.1088/1757-899X/326/1/012009

学科分类：航空航天科学

来源: IOP

【 摘 要 】

The vibration problems of the wind turbine rotors have drawn public attention as the size of wind turbine has increased incredibly. Although various factors may cause the vibration problems, the flexibility is a big threat among them. Therefore, ensuring the high stiffness of the rotors by adopting novel techniques becomes a necessity. The study was a further investigation of several novel designs regarding the dynamic behaviour and the influencing mechanism. The modal testing experiments were conducted on a traditional blade and an isolated blade with the hinged rods mounted close to the root. The results showed that the rod increased both the modal frequency and the damping of the blade. More studies were done on the rods' impact on the wind turbine rotor with a numerical model, where dimensionless parameters were defined to describe the configuration of the interveined and the bisymmetrical rods. Their influences on the modal frequencies of the rotor were analyzed and discussed.