Abstract
The transient response of an infinitely-wide slider bearing subject to tangential acceleration of the thrust ring has been investigated numerically. The reduced Navier-Stokes equations and the continuity equation are solved for a fixed-shoe bearing to produce a time-dependent solution for the pressure distribution, film geometry and velocity distributions for different types of runner acceleration. For a gradual increase or decrease in acceleration the new supporting film is found to be fully developed in the course of a few seconds. When the acceleration or deceleration is very rapid, an oscillation of the runner in the axial direction takes place. In the cases reported, this oscillation is always damped. As the ‘jerk’ (rate of change of acceleration) increases, the vibration increases in frequency, it has a greater amplitude and takes longer to die out. In all cases the resulting runner oscillation takes place about the steady-state position compatible with the new runner velocity.
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