[1] Lu Chunyu, Liu Shaojun,. A fatigue life prediction method of rolling bearingunder elliptical contact elastohydrodynamic lubrication [J]. Journal of Southeast University (English Edition), 2017, 33 (1): 46-52. [doi:10.3969/j.issn.1003-7985.2017.01.008]
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A fatigue life prediction method of rolling bearingunder elliptical contact elastohydrodynamic lubrication(
)
椭圆接触弹流润滑下滚动轴承疲劳寿命预测方法
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 33
- Issue:
- 2017 1
- Page:
- 46-52
- Research Field:
- Mechanical Engineering
- Publishing date:
- 2017-03-30
Info
- Title:
- A fatigue life prediction method of rolling bearingunder elliptical contact elastohydrodynamic lubrication
- 椭圆接触弹流润滑下滚动轴承疲劳寿命预测方法
- Author(s):
- Lu Chunyu; Liu Shaojun
- School of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China
State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China
- Keywords:
- rolling bearing; 3-parameter Weibull distribution; elastohydrodynamic lubrication(EHL); fatigue strength; contact fatigue life
- 滚动轴承; 三参数Weibull分布; 弹流润滑; 疲劳强度; 接触疲劳寿命
- PACS:
- TH133.33
- DOI:
- 10.3969/j.issn.1003-7985.2017.01.008
- 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 bearing 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 international 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.
- 为了更加有效地预测滚动轴承接触疲劳寿命, 提出一种融合弹流润滑、材料疲劳强度和三参数Weibull分布的滚动轴承接触疲劳寿命预测方法.首先, 通过将油膜压力映射到赫兹接触区域来获得椭圆接触弹流润滑下的接触应力.然后, 根据串联可靠性理论推导出基于三参数Weibull分布的滚动轴承基本强度模型.考虑到应力类型、形状变化及载荷波动的影响, 分别建立轴承零件关于最小寿命和特征寿命的P-S-N曲线数学模型, 从而进一步推导出基于三参数Weibull分布和疲劳强度的滚动轴承疲劳寿命预测模型.最后, 将采用所提方法与ISO281: 2007方法和统计学方法得到的滚动轴承疲劳寿命进行对比分析.结果表明:该方法是一种有效、可行的疲劳寿命预测方法, 当可靠性R大于0.93时, 其接触疲劳寿命相对误差比ISO281: 2007方法更小.
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Memo
- Memo:
-
Biographies: Lu Chunyu(1980—), male, graduate; Liu Shaojun(corresponding author), male, doctor, professor, liushaojun@csu.edu.cn.
Foundation item: The National Defense Advance Research Program(No. 81302XXX).
Citation: Lu Chunyu, Liu Shaojun. A fatigue life prediction method of rolling bearing under elliptical contact elastohydrodynamic lubrication[J].Journal of Southeast University(English Edition), 2017, 33(1):46-52.DOI:10.3969/j.issn.1003-7985.2017.01.008.