Effects of multi-excitation on vibration characteristics of planetary gear system
Yong Wang, Yinghua Liao, Huachao Xu
Abstract
In this study, the effects of multi-excitation on the vibration responses of each planetary gear component is investigated based on the translational-rotational dynamic model of planetary gear system. The Fourier series are introduced to simulate the excitation sources, and the frequency–response function are applied to determine the effects of excitation sources on the vibration responses of each planetary gear component in the whole frequency. Therefore, the superposition problem of multi-component vibration responses is effectively solved under multi-excitation sources. Based on the analysis approach, the effects on the vibration response of the sun, carrier, ring, and planet gears are evaluated and compared in detail for planet-ring mesh, sun-planet mesh, floating sun gear, motor torque fluctuation, variable load, gearbox translational vibration, and gearbox rotational vibration. From these results, the mapping is revealed about relationship between excitation sources and the vibration response of each planetary gear component. Combined with the mapping relations, the main vibration component of planetary gear system can be predicted.