Abstract
Abstract
By analyzing friction pairs surface structural characteristics and using theory of contact mechanics, contact mathematic model of microscopic units of thermal distorsion friction pairs is built. Using mathematical statistics and normalization method, microscopic model can be transferred to macroscopic mathematic model, and then the elastic contact characteristics of friction pairs can be calculated. When Kelvin-Voigt model was inputted into elastic contact characteristics, and viscoelastic contact differential operator was led in equation, viscoelastic contact mathematic model that includes the relation of stress to strain is built. So colligating above all the simulation results, axial vibration mathematic model is built, and the nonlinear vibration characteristics and curves of high line speed friction pairs are obtained by simulation. For verifying simulation results, nonlinear vibration experiment of friction pairs of clutch is tested on conditions of various rotational speed. Result shows that the accuracy of the model is 87%, which is meaningful on both theory and engineering design. It promotes study on vibration characteristics to improve friction pairs serviceability and life.