نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه طراحی کاربردی، دانشکده مهندسی مکانبک و انرژی، دانشگاه شهید بهشتی، تهران، ایران
2 دانشگاه شهید بهشتی، دانشکده مهندسی مکانیک و انرژی
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Edgewise vibration in wind turbine blades is one of the important factors that results in reducing the performance of wind turbines. In this paper, an optimally tuned mass damper is proposed to reduce edgewise vibration of a small-scale horizontal axis wind turbine blade (5 kW) with considering the coupling between edgewise and flapwise vibrations. For this purpose, partial differential equations governing dynamics of the system are derived using the Lagrange method. These equations are completely nonlinear and linearization is not performed to avoid possible errors in the analysis and also, the blade is considered as a flexible member. In deriving governing equations, coupling effect between in-plane and out-of-plane vibrations of the blade, and effect of centrifugal forces and gravity are considered. In order to reduce vibration of the blade, a tuned mass damper is used and its parameters are optimized using one of the genetic algorithm methods for a real blade sample. Finally, with applying wind force as a sweep sine excitation, effectiveness of the optimized tuned mass damper in vibration reduction of the blade is investigated and the related results are presented. Results show that the wind turbine blade vibration reduction is achieved properly using the optimally tuned mass damper.
کلیدواژهها [English]