Dynamic analysis of the single rotor-bearing system considering the comprehensive stiffness and damping

Ri, CholUk; RyongSik, O; Zhao, Qiang; Chae, ChungHyok; Sin, YongIl; Sin, Yongkon

doi:10.1093/jom/ufac022

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…The bearing can be simplified as an isotropic spring-damp system assuming that the bearing is supported rigidly. 27 The stiffness and damping coefficients in the horizontal direction are k xx and c xx respectively, and in the vertical direction are k yy and c yy respectively.…”

Section: Dynamical Modeling Of Rolling Bearing Rotor Systemmentioning

confidence: 99%

Vibration characteristics analysis of rolling bearing rotor system considering radial clearance and outer raceway defect

Chen

Liu

Tang

et al. 2023

Advances in Mechanical Engineering

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Because of the radial clearance, the radial stiffness of rolling bearing will show obvious time-varying characteristics, which may cause a certain vibration. The small defects on the raceway of the rolling bearing maybe caused by the vibration under the poor lubrication conditions. A dynamic model of rolling bearing rotor system considering the radial clearance and outer raceway defect is established in this paper. The time-varying stiffness of rolling bearing is fitted by 8-order Fourier series and substituted into the dynamic model. The vibration response of rotor system is obtained to analyze the fault characteristic frequency of rolling bearing. The vibration test of rolling bearing rotor system is carried out, and the fault characteristic frequency of the test bearing is identified by analyzing the frequency spectrum of the obtained vibration signal. The test results are in good agreement with the theoretical values, which verifies the correctness of the dynamic model.

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Section: Dynamical Modeling Of Rolling Bearing Rotor Systemmentioning

confidence: 99%

Vibration characteristics analysis of rolling bearing rotor system considering radial clearance and outer raceway defect

Chen

Liu

Tang

et al. 2023

Advances in Mechanical Engineering

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Fatigue life and fatigue reliability mechanism of ball bearings

Cheng,

Li,

et al. 2024

Journal of Mechanics

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As the main supporting parts of rotating machinery, the fatigue life and fatigue reliability of ball bearings directly affect the accuracy, stability and reliability of equipment. Based on the quasi-static model of bearing and the fatigue life theory, this paper analyzes the effect of the spatial position of rolling element on the mechanical properties and fatigue life of bearing, and studies the action mechanism of bearing working conditions and other parameters. In addition, based on the stress-strength model and the fatigue life model of bearing, the fatigue reliability and sensitivity of bearings are analyzed by means of perturbation method, Edgeworth series and fourth moment technique, and the correctness is verified by the Monte Carlo simulation. Results have important theoretical and practical value, and can provide theoretical support for the research of reliability optimization design, fault mechanism and fault diagnosis method of ball bearings.

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Nonlinear Vibration Analysis of the Coupled Gear-Rotor-Bearing Transmission System for a New Energy Vehicle

Wang

Zeng

et al. 2023

Int. J. Bifurcation Chaos

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Considering the effects of time-varying meshing stiffness, time-varying support stiffness, transmission errors, tooth side clearance and bearing clearance, a nonlinear dynamics model of the coupled gear-rotor-bearing transmission system of a new energy vehicle is constructed. Firstly, the fourth-order Runge–Kutta integral method is used to solve the differential equations of the system dynamics, and the time-varying meshing force diagram, time history diagram, phase diagram, FFT spectrum diagram, Poincaré map and bifurcation diagram of the system are obtained to study the influence of the external load excitation frequency on the dynamics characteristics of the system. In addition, the multiscale method is used to analyze the main resonance characteristics of the system and to determine the main resonance stability conditions of the system. The effect of time lag control parameters and external load excitation frequency on the main resonance of the system is analyzed by numerical methods. The results show that the gear-rotor-bearing coupled transmission system of the new energy vehicle has obviously nonlinear characteristics, avoiding the system instability interval reasonable selection of external load excitation frequency, meshing damping, time lag parameters and load fluctuations, which can be used to improve the stability of the transmission system of the new energy vehicle.

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Dynamic analysis of the single rotor-bearing system considering the comprehensive stiffness and damping

Cited by 3 publications

References 23 publications

Vibration characteristics analysis of rolling bearing rotor system considering radial clearance and outer raceway defect

Vibration characteristics analysis of rolling bearing rotor system considering radial clearance and outer raceway defect

Fatigue life and fatigue reliability mechanism of ball bearings

Nonlinear Vibration Analysis of the Coupled Gear-Rotor-Bearing Transmission System for a New Energy Vehicle

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