The dynamic model of an electric vehicle reducer is established, and the time-varying meshing stiffness curve and meshing impact curve calculated in the previous paper are taken as the excitation. The vibration characteristics of single-stagetransmission with time-varying meshing stiffness, meshing impact and their combined excitation are analyzed The degree of influence of characteristics.
The vibration acceleration of each direction obtained from the solution is synthesized into “the relative vibration acceleration a in the direction of the meshing line of the end face of the gear”, which is taken as the main index to check the vibration degree of the system
Where β 1 represents the helix angle of the gear pair at the input end of the reducer.
The dynamic equations above are solved, and the vibration accelerations in all directions are synthesized according to the formula, and their root mean square values are obtained. The root mean square values of the relative vibration accelerations at each speed are obtained in turn, and the vibration speed diagram of the meshing line direction of the gear end face is drawn. In this section, the vibration characteristics of single-stage helical gear drive excited by time-varying meshing s / M (/ value root mean square velocity plus dynamic vibration direction square line meshing 2) stiffness are analyzed from the time domain, frequency domain and vibration speed diagram of system response. The influence of two key factors, the mean value of time-varying meshing stiffness and the amplitude of time-varying meshing stiffness on the vibration characteristics of single-stage helical gear transmission is studied.