Release of acoustic energy during the fatiguing of a rolling-element bearing

Imran Bashir (), R. Bannister and D. Probert

Applied Energy, 1999, vol. 62, issue 3, 97-111

Abstract: A simple theoretical model has been developed to describe the acoustic energy generated when a fine crack grows in a fatiguing rolling-element steel-bearing in the gearbox of a helicopter during flight. The acoustic-impulse's amplitude (at the bearing) and duration increase from 9.8 x 10-12 to 29.0 x 10-12 m, and from 0.1 to 1 [mu]s, respectively, as the crack growth becomes critical. The detection and measurement of this acoustic energy can lead to the prediction of the associated crack-growth.

Date: 1999
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