Relative Fatigue Life Analysis for Bearing of the Robot of Feeding System In Naval Gun's Ammunition

Two-dimensional digital filtering method is used to simulate the machining surface of the thin walled rotary table bearing of the robot of feeding system in naval gun's ammunition. Taking individual contact pair as the research object, the surface stress distribution is solved by multigrid method under the condition of elastohydrodynamic lubrication. The subsurface stress is solved by ANSYS. Based on the stress life model of Zaresky, the effects of the rough surface parameters, such as RMS(root mean square root), skewness, and kurtosis on relative fatigue life of the thin walled rotary table bearing are studied. The relationships between the RMS, skewness, kurtosis and the relative fatigue life of the bearing are obtained.