Rotordynamics plays a crucial role in identifying critical speeds, and to ultimately design rotating structures that tolerate extremely high vibrations. This example illustrates the application of rotordynamics analysis procedures using the Nelson-Vaugh rotor model.[1]
A 2D axisymmetric representation of the 3D solid model is used to perform a rotordynamic analysis. The results of the 2D axisymmetric model analyses are compared to the full 3D solid model results.
This problem demonstrates the following concepts and techniques:
General axisymmetric meshing of a 3D geometry
Disc and bearing modeling
Gyroscopic effects in rotating structures and modal analysis
Campbell diagram analysis
Determination of critical speeds
Unbalance response analysis
Orbit plot
Performance benefits of 2D axisymmetric models