Whirling of a Uniform Shaft Supported on Journal Bearing

Application ID: 43541


The Whirling of a Uniform Shaft tutorial model shows you how to perform a transient analysis of a uniform shaft under gravity. The shaft is supported by two hydrodynamic bearings at its ends. The gyroscopic effect causes the rotor to whirl about its initial axis and the rotor eventually reaches a steady orbit.

Results include the stress profile on the rotor with the maximum bending stress, the bearing fluid pressure, and the orbit of the journal. In the last result, the journal spirals outwards to eventually reach a steady orbit.

Also analyzed in this example is the frequency spectrum of the journal acceleration, which confirms that the half-frequency whirl is the dominant mode of whirling.

This model example illustrates applications of this type that would nominally be built using the following products:

Rotordynamics Module