NUMERICAL ANALYSIS OF AEROELASTIC STABILITY FOR TWO-DEGREES OF FREEDOM LARGE HORIZONTAL AXIS TURBINE BLADES

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (20) : 65-68.

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NUMERICAL ANALYSIS OF AEROELASTIC STABILITY FOR TWO-DEGREES OF FREEDOM LARGE HORIZONTAL AXIS TURBINE BLADES

ZHU Youfeng ，REN Yongsheng

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Abstract

According to Kallesøe’s equations of blade motion, new model describes two-degrees aeroelastic equations of asymmetric rigidity and general viscous damping, by means of a finite difference discretization and Greenberg aerodynamic theory. A linearized stationary state space of the system can prove the model valid , by analyzing step response graphs and stability of variable parameters such as wind velocities, rotor Speeds, elastic modulus, pitch angles, air densities and densities of blades.

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horizontal axis / turbine blades / state space / aeroelastic stability

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ZHU Youfeng;REN Yongsheng. NUMERICAL ANALYSIS OF AEROELASTIC STABILITY FOR TWO-DEGREES OF FREEDOM LARGE HORIZONTAL AXIS TURBINE BLADES [J]. Journal of Vibration and Shock, 2012, 31(20): 65-68