Synchronous Whirling and Self-oscillations of a Statically Unbalanced Rotor in Limited Excitation

Bykov, V. G.; Товстик, П. Е.

doi:10.3103/s0025654418050047

Cited by 3 publications

(2 citation statements)

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“…Boyaci et al [4] carried out an investigation of the stability and bifurcation phenomena of the rotor-bearing system and found self-excited vibrations with very high amplitudes. Bykov and Tovstik [5] studied synchronous whirling and asynchronous self-excited vibrations on the statically imbalance rotor under action conditions of external and internal damping forces. Because the nonlinear characteristics of the internal friction are very complicated, obtaining succinct expression of the theory is very difficult.…”

Section: Introductionmentioning

confidence: 99%

“…Because the nonlinear characteristics of the internal friction are very complicated, obtaining succinct expression of the theory is very difficult. The mechanism of selfexcited vibrations caused by the internal friction was understood [1] to [5]. Ishida and Yamamoto [6] investigated characteristics of the subharmonic resonance of the order of 1/2 on the rotor-bearing system with a nonlinear spring-restoring force and an internal damping force.…”

Section: Introductionmentioning

confidence: 99%

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Suppression of Self-Excited Vibrations in Rotating Machinery Utilizing Leaf Springs

Wang

Luo

2019

SV-JME

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When rotating machinery is operated above the major critical speed, self-excited vibrations appear due to internal friction of the shaft. Internal frictions are classified into hysteretic damping due to the friction in the shaft material and structural damping due to the dry friction between the shaft and the mounted elements. In this paper, a method to suppress the self-excited vibration using leaf springs are proposed. The structural damping is considered as the internal damping. The characteristics of a rotor with leaf springs are investigated systematically by using simulative and theoretical analyses. The validity of the proposed method is also proved by experiments.

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Section: Introductionmentioning

confidence: 99%