Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : February 28, 2017 - March 03, 2017
The coupled lateral-torsional-axial dynamical model of the two-stage NGW spur planetary gear system is established using the shafting element method. The mode characteristics and the parameter sensitivity are studied, and the analysis indicates that the flexibility of ring-gear has a larger effect on natural frequency. Several distinct types of vibration mode are summarized, such as planet torsional mode, sun-gear shaft axial mode, ring-gear axial mode and so on. However, the translational mode which is one of the modes in the lumped mass coupled lateral-torsional dynamical model is not found in this study. The variation of radial bearing stiffness will also do effect on axial vibration mode, and the variation of bearing stiffness not only affects the vibration modes of adjacent stage of planetary gear train, but also affects the nonadjacent stage. The results demonstrate the coupling characteristics of the system under the free vibration condition.
