Parameter Optimization of Double Grounded Rotor Vibration Absorber
An intelligent optimization algorithm is used to optimize the parameters of a double grounded rotor absorber,the influence law of mass ratio and additional position on vibration suppression performance is discussed.Firstly,according to the structure of the double grounded rotor absorber,the mechanical model of the absorber is established.Secondly,the finite element method is used to es-tablish the dynamic equation of the absorber-rotor system.Then,the response formula of the rotor is derived,and the parameter opti-mization mathematical model of the vibration absorber is established based on the formula.Finally,the variable particle swarm optimi-zation algorithm is used to optimize the parameters of the absorber,and the influence law of mass ratio and additional position on the optimal parameters and the optimal amplitude is analyzed.The results show that,At the same additional position,with the increase of mass ratio,the optimal stiffness kaopt and kgopt,the optimal damping cgopt and the vibration suppression rate of the absorber in-crease,and the optimal amplitude of the rotor decreases.When the mass ratio is 0.1,the closer the additional position of the absorber is to the bearing,the smaller the optimal stiffness kaopt and the optimal damping cgopt are,and the lower the vibration inhibition rate.The optimal stiffness kgopt is little affected by the additional position and tends to the constant value.
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