东南大学学报（英文版）2017，Vol.33Issue(1)：46-52,7.DOI:10.3969/j.issn.1003-7985.2017.01.008
椭圆接触弹流润滑下滚动轴承疲劳寿命预测方法
A fatigue life prediction method of rolling bearing under elliptical contact elastohydrodynamic lubrication
摘要
Abstract
In order to more accurately predict the contact fatigue life of rolling bearing,a prediction method of fatigue life of rolling bearing is proposed based on elastohydrodynamic lubrication (EHL),the 3-parameter Weibull distribution and fatigue strength.First,the contact stress considering elliptical EHL is obtained by mapping film pressure onto the Hertz zone.Then,the basic strength model of rolling beating based on the 3-parameter Weibull distribution is deduced by the series connection reliability theory.Considering the effect of the type of stress,variation of shape and fluctuation of load,the mathematical models of the P-S-N curve of the minimum life and the characteristic life for rolling bearing are established,respectively,and thus the prediction model of fatigue life of rolling bearing based on the 3-parameter Weibull distribution and fatigue strength is further deduced.Finally,the contact fatigue life obtained by the proposed method and the latest intemational standard (ISO281:2007) about the fatigue life prediction of rolling bearing are compared with those obtained by the statistical method.Results show that the proposed prediction method is effective and its relative error is smaller than that of the latest international standard (ISO281:2007) with reliability R ＞ 0.93.关键词
滚动轴承/三参数Weibull分布/弹流润滑/疲劳强度/接触疲劳寿命Key words
rolling bearing/3-parameter Weibull distribution/elastohydrodynamic lubrication (EHL)/fatigue strength/contact fatigue life分类
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路春雨,刘少军..椭圆接触弹流润滑下滚动轴承疲劳寿命预测方法[J].东南大学学报（英文版）,2017,33(1):46-52,7.基金项目
The National Defense Advance Research Program(No.81302XXX). （No.81302XXX）
