Modeling and analysis of bending and torsional coupling vibration response of multi-piece wet friction clutch

The vibration response of the multi-piece wet friction clutch of the coaxial twin-rotor helicopter tail rotor drive system has a certain influence on the stability of the entire tail drive system. According to the concentrated mass method, the multi-degree-of-freedom vibration differential equation of the multi-piece wet friction clutch model is established, as well as considering the unbalanced position of the clutch rotor in the rotational motion, the steel plates and friction plates are equivalent to spline pairs, the vibration displacement generated by the dynamic bonding process in the radial direction is analyzed, comparative analysis is carried out through experiments and theoretical simulations. The results show that both the equivalent dual steel plate and the equivalent friction plate will produce vibration displacement in the Y direction in the steady state, which is consistent with the assumption of clutch rotor imbalance.