Simply Supported Beam Rotor

Application ID: 35831

In this tutorial model, you will see how to set up eigenfrequency and transient analyses (using FFT) of a rotor with various mountings and bearing supports. The example illustrates how to use Campbell and Waterfall plots to find the critical speed. It also demonstrates the range of stability of the rotor.

The rotor is modeled using the Beam Rotor interface in the Rotordynamics Module, an add-on to the COMSOL Multiphysics® software. Inertial properties and offset of the rotor components are modeled using the Disk node. The bearing support is modeled by an equivalent stiffness-based approach using the Journal Bearing node provided in the interface. The FFT analysis uses the Time dependent with FFT study sequence.

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