Dynamic model analysis of load distribution and rolling element slip in degraded bearings

Abstract The size of localized defects on the raceway of a rolling bearing can, to some extent, indicate its performance condition. The influence of raceway defects on load distribution has not been extensively investigated in the literature, so the influence of bearing performance degradation on load distribution has not been widely studied. In this paper, a dynamic model is developed to analyze the load distribution and slip behavior of rolling elements in degraded rolling bearings. As the bearing’s performance deteriorates, raceway defects lead to an internal load distribution shift from a V-shaped to a W-shaped profile and intensify sliding in the defect zone. Finally, simulations and experiments verify the accuracy of the proposed model, methodology, and findings. This model aims to quantify bearing performance by assessing the load distribution patterns and slip behavior of rolling elements, thereby offering a comprehensive understanding of the impact of bearing defects on internal dynamics.