Since 1963
ARTICLE
Numerical and experimental investigation on nonlinear dynamic characteristics of planetary gear train
| 1 | State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, China |
| 2 | R&D Center, Corun Hybrid System Technology Co., Ltd., China |
CORRESPONDING AUTHOR
Jianwu Zhang
State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, 200240, Shanghai, China
State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minhang District, 200240, Shanghai, China
Submission date: 2019-11-28
Final revision date: 2020-03-31
Acceptance date: 2020-03-31
Online publication date: 2020-10-15
Publication date: 2020-10-15
Journal of Theoretical and Applied Mechanics 2020;58(4):1009–1022
KEYWORDS
TOPICS
solid mechanicsstability and vibrations systemsdynamics of machines, vehicles and flying structurescomputational mechanicsexperimental mechanics
ABSTRACT
A deep hybrid electric vehicle (DHEV) equipped with a Ravigneaux compound planetary
gear train (PGT) encounters severe gear whine noises during acceleration in the EV drive
mode. For the analysis of vibro-acoustic sources, a 5DOF lumped-parameter vibration model
for the PGT dynamic system is established as well as sound pressures radiated from the
transmission on a test bench are measured for data processing and recognition. By comparison
between numerical and experimental analyses, natural vibration modes of the PGT are
examined and high frequency modal resonances in association with the planetary gears are
observed only to cause narrow band whine noises. Furthermore, a 2DOF reduced dynamic
model for the planetary gears with consideration of nonlinearities such as time-varying mesh
stiffness and backlash is proposed, and numerical solutions to bifurcations and dynamic instabilities
of the two sets of planetary gears are obtained. It is found that nonlinear vibration
behaviour of the long and short planets are major causes of shock and vibration of the hybrid
transmission. Severe vibro-acoustic noises excited dominantly by the planetary gears
are alleviated after implementing micro-geometry modifications to the PGT.
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