The vibration spectra of epicyclic gears commonly exhibit considerable asymmetry of the modulation sidebands and even complete suppression of the component at the tooth meshing frequency. A model is proposed which explains these observations in terms of the relationship between the vibrations generated by each of the planet gears as they move relative to the transducer location. Comparisons of the predictions of the model with measured vibration spectra for several epicyclic gearboxes show good agreement.
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References
1.
BoyesJ. D.Analysis techniques for gearbox diagnosis using the high resolution FFT analyser. Bruel and Kjaer Application Note 106–81, 1981.
2.
GuA. L.BadgleyR. H.ChiangT.Planet-pass-induced vibration in planetary reduction gears. ASME paper 74-DET-93, 1975.
3.
SeagerD. L.Conditions for the neutralization of excitation by the teeth in epicyclic gearing. J. Mech. Engng Sci., 1975, 17(5), 293–298.
4.
RandallR. B.A new method of modeling gear faults. Trans. ASME, J. Mech. Design, 1982, 104, 259–267.
5.
BotmanM.Vibration measurements on planetary gears of aircraft turbine engines. Journal of Aircraft, 1980, 17(5), 351–357.
6.
McFaddenP. D.SmithJ. D.Model for the vibration produced by a single point defect in a rolling element bearing. J. Sound Vib., 1984, 96(1).
7.
BrighamE. O.The fast Fourier transform, 1974, 37, 58. (Prentice-Hall, New Jersey.).
