Abstract: Tooth stiffness of face gear is the main parameter of dynamic analysis and optimization design for face gear transmission,and the design parameters of face gear have important influence on the stiffness of face gear tooth.The finite element analyses about the tooth’s stiffness of different meshing points are made based on Ansys Workbench and Ansys Classic.It researched that analysis of influence of tooth’s stiffness by main design parameters of face gear.From the results,the conclusions can be obtained as follow:Tooth’s stiffness of face gear decreases along the direction of tooth root to the tip gradually,and tooth’s stiffness increases with the increase of module,pressure Angle,tooth width;the changing ratio of tooth’s stiffness along the tooth root to the tip increases with the decrease of module,as the tooth width increases,the pressure angle doesn’t much affect on the changing ratio.

Key words: the face gear, Finite Element Analysis (FEA), tooth stiffness, design parameters