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
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.