Optimum Design of Damped Vibration Absorber for Viscoelastic Bladed Disk Assemblies
Keywords:Viscoelastic bladed disk assemblies, Rotationally periodic structures, Order tuned vibration absorber, Damping, Optimization
The main goal of this study is to examine the effectiveness of viscoelastic blades which are equipped with order tuned vibration absorber for vibration suppression of rationally periodic bladed disk assemblies. Kelvin-Voigt model is chosen to represent the linear viscoelastic behavior of the blade. A model with one degree of freedom is extracted for blades. Simple pendulum, as a damped order-tuned vibration absorber, is attached to the each blade. Aerodynamic damping and coupling effects between the blades are considered. A numerical method with H2 optimization criterion is used to optimize the parameters of the absorber to attenuate vibrations during steady operation. Results are compared with the behavior of the elastic blades. Finally, the literature is reviewed and validity of the results is confirmed.