Influence of tooth surface friction and meshing stiffness on dynamic characteristic of double involute gear
FAN Zhimin, XV Junjun
（College of Mechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China）
 

Abstract: Aiming at the dynamic characteristic problem of double involute gear transmission, the finite element model of the double involute gear was established, two factors of tooth surface friction and meshing stiffness were considered. the finite element modal analysis of double involute gear was carried out, the influence of tooth surface friction and meshing stiffness on gear vibration deformation and modal frequency was analyzed. The dynamic characteristics of the double involute gear transmission were studied by using different modal orders, the change of vibration deformation and modal frequency of different modes were analyzed. The results indicate that the vibration deformation and modal frequency of different modal orders are different, with the increase of friction coefficient and meshing stiffness, the vibration deformation and modal frequency of the double involute gear transmission system are significantly increased. Thus, tooth surface friction and gear meshing stiffness of double involute gear system have significant influence on vibration deformation and modal frequencies under different modes, when the dynamic characteristic of double involute gear transmission system is studied ,the tooth surface friction and gear meshing stiffness must be fully considered.
Key words:  double involute gear; friction; meshing stiffness; vibration deformation; modal frequency