StabilityAnalysis of Vibration Suppression Performance of Double Three-element Rotor Absorber
Based on the dynamic modeling of the double three-element vibration absorption-rotor system,the sensitivity evaluation model is established according to the local sensitivity analysis method.The sensitivity of the optimal vibration suppression performance to the parameters,unbalance force and installation position of the vibration absorber is analyzed.The stability of the vibration suppres-sion performance of the vibration absorber is discussed.The results show that when the parameter deviation coefficient is-0.35,the sensitivity of the optimal vibration suppression performance to the mass of the two individual vibration absorbers is 0.54 and 0.36,and the sensitivity to the series stiffness is only 0.03 and 0.12.On the whole,the sensitivity coefficient of the parameters of the single ab-sorber with larger natural frequency is smaller.When the unbalance force increases,the sensitivity coefficients are also positive.When there is an error in the installation position,the sensitivity coefficient of the vibration absorber is as low as 0.05 when the installation position is close to the optimized installation position,and the sensitivity is as high as 1.58 when the installation position is far from the optimized installation position.The conclusion is that the mass has the greatest influence on the stability of the optimal vibration sup-pression performance,and the series stiffness has the least influence.The parameters of the individual vibration absorber with small natural frequency have great influence on the stability.The closer the installation position is to the optimized installation position,the higher the stability.
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