Effects of inner and outer rings&rsquo; damage of rolling bearings on responses of a dual-disc rotor-bearing system

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (7) : 43-51.

Effects of inner and outer rings’ damage of rolling bearings on responses of a dual-disc rotor-bearing system

HUANG Ya-ming1,2 CAO Shu-qian 1,2,3

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Abstract

For a dual-disc rotor system supported with rolling bearings, its dynamic model fully considering VC (varying compliance) vibration arising due to periodic change of rolling bearings’ stiffness was established by using Lagrange equation. Forces exerted on the rotor system due to bearings having local damage on outer and inner rings were analyzed. With the method of numerical integration, the system responses were obtained. The effects of bearings’ outer and inner rings damage on dynamic characteristics of the rotor system were studied. It was shown that damages of bearings’ outer and inner rings have larger effects on dynamic characteristics of the rotor-bearing system, these damages can enlarge the system’s vibration, especially, within a lower rotating speed range, the system’s vibration amplitude increases with increase in damage width; damage on outer ring interferes nonlinear factors of bearing clearance, while damage on inner ring enhances the action of these factors.

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dual-disc rotor-bearing system / inner and outer rings&rsquo / damage of rolling bearing / dynamic characteristics / numerical integration

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HUANG Ya-ming1,2 CAO Shu-qian 1,2,3. Effects of inner and outer rings’ damage of rolling bearings on responses of a dual-disc rotor-bearing system[J]. Journal of Vibration and Shock, 2018, 37(7): 43-51

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