Study on Nonlinear Meshing Stiffness of Spline

In the study on the dynamic characteristics of spline rotor system, the spline stiffness is simplified as the constant related with single tooth stiffness. Based on spline single tooth stiffness calculation, according to spline deformation, stress and torque, spline transverse meshing stiffness model is established, and the numerical simulation analysis is managed. The results show that: under the small deformation condition, spline lateral stiffness is a constant related with single tooth stiffness, number of teeth and pressure angle; under the large deformation, there is complex nonlinear relationship between the lateral stiffness and torque, lateral force. The results provide more accurate theoretical model for nonlinear dynamic characteristics analysis of spline rotor system.