Vibration control of rotor system by ultrasonic excited limiter

Yao, Hongliang; Zhao, Qian; Wu, Hao; Wen, Bangchun

doi:10.1007/s12206-015-0410-9

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…The external force applying is another method, for example, Fan and Pan 16 proposed the electromagnetic force generated by the active electromagnetic actuator to eliminate the oil and dry whips in the rotor system. The ultrasonic force was very suitable for small rotor vibration attenuation as described by Yao et al 17 Chen et al 18 presented the active magnetic bearings of the adaptive frequency estimator for the rotor unbalance vibration suppression.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear dynamic behavior and stability of a rotor/seal system with the dynamic vibration absorber

Niu

Yao

et al. 2019

Advances in Mechanical Engineering

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The dynamic vibration absorbers have been applied to attenuate the critical or unbalanced vibration but may create the fluid-induced vibration instability in the rotor/seal system. The major purpose of this study is devoted to the effects of the dynamic vibration absorber on the nonlinear dynamic behavior and stability of the fluid-induced vibration in the rotor/seal system. The dynamic vibration absorber is attached on the shaft in the perpendicular directions. The model of the rotor/seal-dynamic vibration absorber system is established as the modified Jeffcott rotor system, and Muszynska nonlinear seal force is applied. The numerical method is used for the dynamic behavior analysis. The effects of the natural frequency and damping ratio of the dynamic vibration absorber on the dynamic behavior are discussed. The stability of the rotor/seal-dynamic vibration absorber system is judged by the eigenvalue theory. The variations of the instability threshold with the parameters of the dynamic vibration absorber are obtained. The results show that the instability threshold and instability vibration frequency are changed by the dynamic vibration absorber. The parameters of the dynamic vibration absorber must be selected carefully to avoid reducing the instability threshold and causing the instability vibration to occur in advance when the dynamic vibration absorber is applied to attenuate the critical or unbalanced vibration of the rotor/seal system.

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Section: Introductionmentioning

confidence: 99%