Mass-eccentricity nonlinear evolution mechanism of combined rotor in fretting slip process

Abstract

This paper studied the mass-eccentricity nonlinear evolution in fretting slip process. Firstly, a mechanical analysis of combined Jeffcott rotor under rotating condition is carried out, and the mass-eccentricity evolution laws in sticking, partial sliding, and fully sliding stages were preliminarily obtained. Subsequently, based on the measured preload values of the combine rotor, the nonlinear evolution process of mass-eccentricity was reproduced by numerical simulation. Finally, the effects of the preload distribution and rotation speed on mass-eccentricity evolution are systematically discussed. The results show that: the initial mass-eccentricity is closely related to the preload distribution, and the accuracy of mass-eccentricity evolution model (in fully sliding stage) is: R-square= 0.997. The research content provides strong support for the study of connection structure dynamics.