To make an efficient evaluation of wheel-motor unit assembly bearings condition - the research on factors influencing the vibration level is required.
For such a research there was developed a mathematical model connecting a rolling bearing vibration signal level with linear dimensions of a defect and shaft rotation frequency, which shows that the vibration amplitude is proportional to the rotation frequency, linear dimensions of a defect and loading on the bearing.
Vibration level-vs-defect size curves are built.
Thus, creating systems for condition diagnostics and monitoring of EMU-train bearing assemblies, in order to increase the reliability of diagnostics it is important to consider the influence of the rotation frequency and characteristics of the defect mode at different speed rates.
Kostyukov V.N., Zaytsev A.V., Tsurpal A.E., Basakin V.V. Research on EMU-train rolling bearing defect influence on vibration parameters values // Increase of traction and energy efficiency and reliability of electric rolling stock: interuniversity special scientific paper volume – Omsk: OmSTU, 2013. - pp.50-53
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