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:
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.