Abstract
Reynolds equation considering boundary slippage was used to calculate the oil film pressure, and Euler method was used to establish the motion equation of the axis in the coordinate system to solve the acceleration, velocity and position coordinates of the axis. Due to the influence of velocity slippage, the oil film pressure increases with the increase of slippage length, thus increasing the oil film force, the vibration of the axis and aggravating the instability of the axis, but decreasing the rotational speed of vortex; the shaft center trajectory gradually moves down to reduce the maximum external bearing load. When the length-diameter ratio becomes large, the effect of slippage length on shaft center trajectory is gradually reduced.
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