中文摘要：

圆柱滚子轴承的凸度参数是影响其疲劳寿命的重要参数，选用对数曲线凸型由于可减轻滚子的边缘应力集中现象且应力分布较为均匀而获得了广泛应用，但轴承存在偏载时边缘应力不能得到很好的消除。基于Johns—Gohar凸度模型提出了一种新的对数曲线方程，可通过改变方程中的两个系数调整凸度设计，给出了考虑滚予凸度的拟静力学模型计算圆柱滚子轴承的应力分布，根据应力分布结果计算了滚子轴承的修正参考额定寿命。结果发现使用本文提出的滚子凸度设计方程，在偏载工况下可以显著改善应力分布，并提高滚子轴承的修正参考额定寿命。

英文摘要：

For cylinder roller baring, the profile of roller is an important parameter to affect the fatigue life. Logarithmic function prolife is used widely in roller because it can decrease edge stress effect and can obtain uniform stress distribution, however, edge effect still exist especially when large load or tilting moment acting on the roller bearing. In this paper, a new logarithmic roller profile model has been proposed, in which two factors are used to adjust roller profile. A quasi-static model is given to calculate contact load distribution of roller bearing, then modified reference rating life can be calculated based on the stress distribution. Examples are demonstrated to verify the proposed model for contact stress distribution and fatigue life. The results show that the profile design method in this paper could aid in improving stress distribution of cylinder roller bearing and increasing fatigue life of roller bearing.