Bearings in electric machines often work in high speed, light load and vibration load conditions. The purpose of this paper is to find a new fatigue damage accumulation rating life model of ball bearings, which is expected for calculating fatigue life of ball bearings more accurately under vibration load, especially in high speed and light load conditions.,A new fatigue damage accumulation rating life model of ball bearings considering time-varying vibration load is proposed. Vibration equations of rotor-bearing system are constructed and solved by Runge–Kutta method. The modified rating life and modified reference rating life model under vibration load is also proposed. Contrast of the three fatigue life models and the influence of dynamic balance level, rotating speed, preload of ball bearings on bearing’s fatigue life are analyzed.,To calculate fatigue rating life of ball bearings more accurately under vibration load, especially in high speed and light load conditions, the fatigue damage accumulation rating life model should be considered. The optimum preload has an obvious influence on fatigue rating life.,This paper used analytical method and model that is helpful for design of steel ball bearing in high speed, light load and vibration load conditions.,The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2019-0180/

中文翻译：

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振动载荷下球轴承疲劳损伤累积额定寿命新模型

电机中的轴承经常在高速、轻载和振动负载条件下工作。本文的目的是寻找一种新的球轴承疲劳损伤累积额定寿命模型，以期能够更准确地计算球轴承在振动载荷下的疲劳寿命，特别是在高速轻载条件下。,一种新的疲劳损伤提出了考虑时变振动载荷的球轴承累积额定寿命模型。采用Runge-Kutta方法构造并求解转子-轴承系统的振动方程。还提出了振动载荷下修正额定寿命和修正参考额定寿命模型。对比三种疲劳寿命模型，分析动平衡水平、转速、球轴承预紧力对轴承疲劳寿命的影响。为了更准确地计算球轴承在振动载荷下的疲劳额定寿命，特别是在高速和轻载条件下，应考虑疲劳损伤累积额定寿命模型。最佳预载荷对疲劳额定寿命有明显影响。,本文采用了有助于钢球轴承在高速、轻载和振动载荷条件下设计的分析方法和模型。,本文的同行评审历史可用在：https://publons.com/publon/10.1108/ILT-05-2019-0180/