an 8 degrees of freedom dynamic model and dynamic equations of spiral beveled bevel gears were established. Considering the static transmission error
tooth surface friction and tooth clearance comprehensively
the dynamic responses of transmission system were solved by Runge-Kutta algorithm with variable step lengths
and the effects of friction coefficient and coincidence degree on the vibration amplitude of the transmission system were studied. The results showed that the friction coefficient was different under different working conditions. With the decrease of lubricating oil
the friction coefficient
the system’s vibration displacement and normal meshing force increased; coincidence degree was reduced
but vibration amplitude and normal meshing force increased while the angle between the contact trace and the root cone increased.