Dynamic analysis of localized defects in rolling bearing systems

Abstract

Abstract. In this paper, the dynamics of rolling bearing with localized defects of the outer ring and rolling element are investigated. In order to study the nonlinear dynamical behaviors of the rolling bearing precisely, a novel dynamic model of the rolling bearing is established based on the Lagrangian approach. By setting 0.2 mm, 0.4 mm and 0.6 mm local defects on the outer ring and rolling element of bearing respectively, the results demonstrate that the amplitude of the rolling bearing is more intense as the local defect size increases, and the acceleration amplitude fluctuation is more significant than the velocity. In addition, in the case of the same defect size, the vibration of the rolling element defect is more intense than the vibration response caused by the outer ring defect.

Joint time-frequency distribution of rolling bearings with multiple faults on outer raceway based on asymptotic model

“…The vibration response characteristics of rolling bearings with one fault have attracted the attention of many researchers (Chen and Qu, 2019; Li et al, 2018; Liu and Shao, 2018; Qin et al, 2020; Song et al, 2017; Tomovic, 2020; Yan et al, 2020). In industrial practice, mechanical equipment is normally subject to some degree of damage before overhauling and replacing parts, considering the cost and other relevant aspects.…”