Vibro-acoustic analysis of defective taper roller bearings

This article outlines the experimental and statistical techniques used to investigate the incipient faults in the tapered roller bearing (TRB) system. To test the noise and vibration response of TRB, the important process variables of bearing faults (outer race, inner race and roller) are operating speed and radial load. The proposed study employs a full factorial design and ANOVA to investigate the influence of load and speed on bearing vibrations and noise. General multifactorial design integrates statistical and mathematical methods to depict the relationship between the inputs and outputs of a physical system. Using the design of experiments (DOE) method, 64 experiments are constructed by considering two continuous and one categorical factor at four levels. This study presents the results of experiments conducted on SKF 30205 TRBs (healthy and in the presence of defects), utilising statistical tools to provide a comprehensive analysis of the experimental data. The data related to vibration response, which includes metrics such as root mean square and kurtosis and Leq for noise are methodically collected for further analysis. The findings emphasise the potential of utilising combined parametric effect analysis to impact the DOE. This approach provides useful insights for predicting performance differences between fresh and defective TRBs in the rotor-bearing system.