Application of a finite element package for modeling rotating machinery vibrations

Abstract EN

ANSYS has no module to analyze dynamics of rotor-bearing systems, especially to calculate critical speeds.

But it has element types, such as beam element and matrix27 element, which can be modeled as stiffness, damping and mass matrix.

In this paper, BEAM4 element and MATRIX27 element are adopted to model the shaft, rotating disks and bearings.

Some ideas are presented to deal with critical speeds calculation using ANSYS.

The accuracy of the model and the solution technique have been demonstrated by comparison with results of previous publications.

Very good agreement has been obtained.