Analysis of the Vibration Characteristics of A Rub-impact Rotor with A Double Three-element Vibration Absorber
The vibration characteristics of a rotor with an optimal double three-element rotor absorber with resonance suppression under rub-impact were studied.The dynamic equation of the absorber-rotor system is established by using the rotor dynamics method,and the equation is solved by Newmark-Newton method.The influence of the absorber parameters and friction parameters on the rotor vibra-tion characteristics is analyzed by using the bifurcated diagram.The results show that when the ka1 of the single absorber 1 with small stiffness is 1.66～2 times of the optimal value,the absorber rotor presents periodic two motion,and the rotor is basically in periodic N motion or chaotic motion when other parameters change.When the ka2 of the single absorber 2 with large stiffness is 1.36～2 times of the optimal value,the absorber and rotor show periodic two motion,and the rotor is basically in periodic N or mixed motion when other parameters change.The change of friction stiffness will make the motion of the absorber rotor change from periodic four-motion to peri-odic N-motion or chaotic motion.When the friction coefficient of friction is 0.8～1.18 times and 1.48～1.6 times of the initial value,the system moves in period two motion except that the vibration absorption-rotor moves in period four motion.
rotor vibration absorberrub-impactrotorbifurcationperiodic N motionchaotic motion
万方数据
维普
