依据赫兹接触强度计算理论，着重研究了圆柱滚子轴承内、外圈及滚动体的接触应力。
Beased on the theory of Hertz stress, the contact stress of roller bearing is analysed in this paper.
本文通过八对圆弧齿线圆柱齿轮的运转接触疲劳试验，得到了45钢正火齿轮的接触疲劳极限应力框图，可供圆弧齿线圆柱齿轮传动的接触强度计算参考使用。
In this paper, contact endurance limit diagram of 45 normalizing gear is obtained from contact fatigue teste on 8 pairs of CATT gears. It is worthy reference for a calculation of gear design.
根据求得的时域内抽油杆柱受力变形值以及与油管柱碰撞接触力，计算了抽油杆柱动强度和扶正器安放位置。
The dynamic strength of rod string and the mount position of centralizer were calculated, according to the acquired deformation of rod string and its impact contact force with tube in the time domain.
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