Abstract
This paper presents a structural optimization design of the realistic large scale wind turbine blade. The mathematical simulations have been compared with experimental data found in the literature. All complicated loads were applied on the blade when it was working, which impacts directly on mixed vibration of the wind rotor, tower, and other components, and this vibration can dramatically affect the service life and performance of wind turbine. The optimized mathematical model of the blade was established in the interaction between aerodynamic and structural conditions. The modal results show that the first six modes are flapwise dominant. Meanwhile, the mechanism relationship was investigated between the blade tip deformation and the load distribution. Finally, resonance cannot occur in the optimized blade, as compared to the natural frequency of the blade. It verified that the optimized model is more appropriate to describe the structure. Additionally, it provided a reference for the structural design of a large wind turbine blade.
Highlights
Background and MotivationAs a key wind turbine component, the blade is a determining factor for energy harvesting efficiency and a main source of complicated and extreme loads
Studying the deformation and vibration of the blade under fluid structure interaction is of great significance to the safe operation of large wind turbines
Cortınez and Piovan [8] developed a theoretical model for the dynamic analysis of composite thin-walled beams with open or closed cross sections
Summary
As a key wind turbine component, the blade is a determining factor for energy harvesting efficiency and a main source of complicated and extreme loads. Studying the deformation and vibration of the blade under fluid structure interaction is of great significance to the safe operation of large wind turbines. Many scholars have studied the structural dynamics of wind turbine blades in the aerodynamic and structural coupling conditions. Harte et al [6] established the coupling model of the wind turbine; the modal was analyzed under different loads. Cortınez and Piovan [8] developed a theoretical model for the dynamic analysis of composite thin-walled beams with open or closed cross sections. Taking the aerodynamic and structural coupling effect conditions into consideration, the mathematical model was established by taking the minimal mass of the blade as the optimization objective, the interaction mechanism between the blade tip deformation and load distribution was studied by using modal analysis. It was illustrated that the establishment mathematical model is reasonable, and it can improve the blade dynamic performance
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
