A non-linear lumped parameter model of a gear system is proposed in order to study the modifications in torsional vibration due to faults. The model takes into account the mass distribution, torsional shaft stiffness and variable tooth-meshing stiffness and is validated by comparison with experimental results. Faults localized in one or a few teeth produce dynamic effects that are typically transient and timelocalized. Then, the wavelet transform - that produces a time-frequency representations suited for resolving very short-lived high frequency phenomena in the time domain - is applied to both numerical and experimental results for the detection of damaged teeth. The effectiveness of model both in the case of sound and damaged gears is discussed
Dynamic Modelling of Gear System for Condition Monitoring and Diagnostics / Dalpiaz, G; Rivola, A; Rubini, Riccardo. - STAMPA. - 2:(1996), pp. 185-192. (Intervento presentato al convegno Congress of Technical Diagnostics tenutosi a Gdansk nel 17-20 settembre 1996).
Dynamic Modelling of Gear System for Condition Monitoring and Diagnostics
RUBINI, Riccardo
1996
Abstract
A non-linear lumped parameter model of a gear system is proposed in order to study the modifications in torsional vibration due to faults. The model takes into account the mass distribution, torsional shaft stiffness and variable tooth-meshing stiffness and is validated by comparison with experimental results. Faults localized in one or a few teeth produce dynamic effects that are typically transient and timelocalized. Then, the wavelet transform - that produces a time-frequency representations suited for resolving very short-lived high frequency phenomena in the time domain - is applied to both numerical and experimental results for the detection of damaged teeth. The effectiveness of model both in the case of sound and damaged gears is discussed
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