变速器设计外文翻译

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变速器设计-外文翻译Dynamic Modeling of Vehicle Gearbox for Early
Detection of Localized Tooth Defect
Nagwa Abd-elhalim， Nabil Hammed， Magdy Abdel-hady，
Shawki Abouel-Seoud and Eid S. Mohamed
Helwan University
ABSTRACT
Dynamic modeling of the gear vibration is a useful tool to study the vibration response of a geared system under various gear parameters and operating conditions. An improved understanding of vibration signal is required for early detection of incipient gear failure to achieve high reliability. However， the aim of this work is to make use of a 6-degree-of-freedom gear dynamic model including localized tooth defect for early detection of gear failure. The model consists of a gear pair， two shafts， two inertias representing load and prime mover and bearings. The model incorporates the effects of time-varying mesh stiffness and damping， backlash， excitation due to gear errors and modifications. The results indicate that the simulated signal shows that as the defect si