A forced response-based method to track instability of rotating systems

The paper is focused on the stability computation of a rotating system affected by parametric excitation, by using a frequency based computational method. The test case is a Jeffcott rotor excited by the unbalance of the disk and by the parametric excitation due to varying compliance of the rolling bearing elements of the supports. The stability of a system is typically studied using Floquet's theory based on direct time integration, or less...