Vibration Suppression of the Friction Plate Based on the Gear Tooth Profile Modification for a Six-Speed Planetary Gear Transmission System

Friction plates are critical parts of clutch operators for the planetary gear transmission system (PGTS). Their healthy working conditions have significant importance for the steady operations of the PTGS. However, continuous impact could occur between the friction plates and the inner hub of clutches, which has a great influence on the stability and lifetime of the friction plates. In this paper, the multibody dynamic model of a six-speed planetary gear transmission system (SSPGS) is proposed. The impact forces between the friction plates and inner hubs are calculated based on multibody theory. The gear tooth tip modifications are introduced, and the meshing forces between gear pairs are calculated and considered. The SSPGS model is simulated, and the vibration characteristics of the inner hubs under different tooth modification amounts are obtained and compared. The effectiveness of the tooth tip modification on the vibration mitigation of the SSPGS is investigated. Several suggestions for the design of the highly stable SSPGS are provided.