Mass-eccentricity nonlinear evolution mechanism of combined rotor in fretting slip process. (January 2023)

• Record Type: Journal Article
• Authors: Zhao, Binbin; Sun, Qingchao; Zhao, Rongxuan; Yang, Yang; Sun, Kepeng; Mu, Xiaokai
• Is Part Of: Tribology international. Volume 179(2023)
• Publication Date: 2023-01
• Subjects: Mass-eccentricity -- Fretting slip -- Numerical simulation -- Preload distribution; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2022.108195
• Languages: English
• ISSNs: 0301-679X

Abstract

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. Highlights: Studied the mass-eccentricity behavior of combined rotor in fretting slip process for the first time and revealed its formation mechanism. Analyzed the mass-eccentricity evolution laws in whole sticking-sliding stage, and constructed an analytical expression of mass-eccentricity in fully sliding stage. Reproduced the mass-eccentricity phenomenon by carrying out numerical simulation. The quantitative correlation between preload distribution and initial mass-eccentricity is realized, and the correctness of the mass-eccentricity theoretical model in fully sliding stage is verified.