1. An experimental and signal analysis workflow for detecting cold-induced noise emissions (cold squealing) from porous journal bearings
- Author
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D. Bianchi, I.A. Neacşu, G. Vorlaufer, and Stefan J. Eder
- Subjects
0209 industrial biotechnology ,Materials science ,engrXiv|Engineering|Mechanical Engineering|Tribology ,Tribology ,bepress|Engineering ,Acoustics ,bepress|Engineering|Mechanical Engineering|Tribology ,bepress|Engineering|Mechanical Engineering ,engrXiv|Engineering|Mechanical Engineering ,Aerospace Engineering ,FOS: Mechanical engineering ,02 engineering and technology ,01 natural sciences ,Signal ,law.invention ,Resonator ,020901 industrial engineering & automation ,Engineering ,law ,0103 physical sciences ,Range (statistics) ,010301 acoustics ,Joint (geology) ,Civil and Structural Engineering ,Signal processing ,Bearing (mechanical) ,Noise (signal processing) ,Mechanical Engineering ,Computer Science Applications ,engrXiv|Engineering ,Control and Systems Engineering ,Signal Processing ,Transient (oscillation) - Abstract
We employ a variant of the joint time-frequency analysis (JTFA) for identifying transient, temperature-dependent noise emitted from porous journal bearings operated at temperatures between −40 °C and 0 °C. This phenomenon, called “cold squealing”, is difficult to reproduce in laboratory environments, as it requires a suitable (and typically system-specific) resonator to occur. We systematically tested real-world bearings impregnated with various oils on a custom-designed experimental rig, fitted with a coolable sample holder and a vibration sensor, over a range of rotational speeds. By analyzing temperature-differential JTFA signal maps, we succeeded in detecting transient cold-squealing as well as ranking the bearing lubricants according to their low-temperature quiet running properties.
- Published
- 2018
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