Analysis of Effects of Radial Clearance and Unbalance on Vibration Responses of a Rotor-Bearing System
How to Cite?
Prashant H. Jain, Dr. Santosh P. Bhosle, "Analysis of Effects of Radial Clearance and Unbalance on Vibration Responses of a Rotor-Bearing System," International Journal of Engineering Trends and Technology, vol. 70, no. 3, pp. 327-333, 2022. Crossref, https://doi.org/10.14445/22315381/IJETT-V70I1P237
Abstract
The objective of this paper is to study and analyze the effects of change in radial clearance of ball bearing under balanced and unbalanced rotor conditions at different speeds and radial loads. In this paper, a rotor-bearing system is modelled, and its vibration responses are simulated for different operating conditions using COMSOL multiphysics software. Two-level full factorial design with four factors (24 full factorial design) is used for the design of simulation experiments, and the design is analyzed by using analysis of variance (ANOVA). Four factors, namely disk eccentricity (for balanced/unbalanced rotor), radial clearance, rotor speed and radial load, are used in this study. Root mean square velocities of time waveform in vertical and horizontal directions are considered as vibration response parameters. Minitab software is used to create the factorial designs, ANOVA tables, regression equations and various plots. Response surfaces obtained clearly depict the effects of radial clearance, disk eccentricity, rotor speed and radial load on vibration amplitude. The designed models are significant, with large R-square values (> 99 %). It is also observed that radial clearance has a remarkable effect and radial load has a negligible effect on vibration responses of the rotor-bearing system for the selected range.
Keywords
Vibration signal analysis, full factorial design (FFD), COMSOL, radial clearance of bearing, unbalance.
Reference
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