14827

13343

كارشناسي ارشد

طراحي كاربردي

اصفهان : دانشگاه صنعتي اصفهان

1398

شانزده، [95]ص.: مصور، جدول، نمودار

سعيد بهبهاني

رضا تيكني

سعيد ضيايي راد، محمد دانش

1398/05/08

كتابنامه

مهندسي مكانيك

مهندسي برق و كامپيوتر

1398/05/08

2550632

Modeling and Control of Vibrations in the Wind Turbine Mohammad Dayyani Dayyani mhm@gmail com Date of Submission June 25 2019 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language PersianSupervisor Saeed Behbahani behbahani@cc iut ac irAbstractIn the current work the dynamic behavior of the wind turbine with a horizontal shaft and controlling the vibrationsbased on the active and passive methods are investigated This study is based on presenting methods to reduce thewind turbine damages by controlling the vibrations In recent years many studies have focused on the vibrationand control of wind turbines but in the current study the aim is improving the control system regarding moredetailed assumptions in system parameters and modeling the semi couple aeroelasticity vibrations in the blade Therefore the aerodynamic forces of wind are modeled by the blade element momentum and the modified Prandtlcoefficients and Glauert are used in simulations to improve the effective axial inductive coefficient in aerodynamicforces In the current study the blade is modeled as a clamped beam in one end and free on the other side Thedistribution of geometrical and mechanical parameters such as mass distribution bending stiffness in the axialdirection of the blade is defined as a function of position Then using tuned mass dampers in blades and Nusslethe vibrations are controlled by passive control method Some assumptions are interactions between tower andblade and the interactions between blades in and off planes Also to improve the control effects of tuned massdampers and reducing the maximum vibrations of blades the active LQR control using piezoelectric plates onblades is applied Results show that this method had better performance compared to the passive method Toimprove the response of tuned mass dampers the nonlinearity in the movement of dampers is assumed in themodel In this simulation by considering the nonlinearity of the dynamic of the system and consequentlycontrolling the nonlinear vibrations the response improves significantly Finally the obtained results of differentcontrol methods are compared and the best result is presented as the premium method Keywords Wind turbine Vibrations of wind turbine Piezoelectric plates Tuned mass damper

سعيد بهبهاني

رضا تيكني

سعيد ضيايي راد، محمد دانش