A simplified six degree of freedom dynamic mathematical model of gear system is established to study the dynamic response characteristics of the system without pitting and with pitting
(1) The dynamic model of single-stage gear transmission with six degrees of freedom including the characteristics of prime mover, gear pair and load machine is established, and the accurate system parameters are calculated with the help of two-dimensional and three-dimensional numerical simulation software, and the statistical evaluation indexes of relevant system response are listed;
(2) The fourth-order or fifth-order Runge Kutta numerical method is used to study the dynamic response characteristics of the system without pitting and with pitting. Different speed and damping ratio parameters can cause different response characteristics of gear vibration displacement and dynamic transmission error between gear pairs. When pitting occurs on the tooth surface, the system will produce local unbalanced dynamic response characteristics, such as the increase of response amplitude, the decrease of meshing stiffness and so on. These unbalanced response characteristics pave the way for the later diagnosis and monitoring offault.