Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Experimental identification of unbalance and shaft bow in a Laval rotor by means of correlation analysis and model order reduction
Submission Author:
Fabio Dalmazzo Sanches , RN
Co-Authors:
ROBSON PEDERIVA, Fabio Dalmazzo Sanches
Presenter: Fabio Dalmazzo Sanches
doi://10.26678/ABCM.COBEM2017.COB17-0796
Abstract
This paper discusses the experimental identification of the simultaneous occurrence of two of the most common faults in rotors: unbalance and shaft bow, which present similar symptoms. Thus the faults identification becomes a challenging matter. The dynamic system was modeled by finite elements and the bearing parameters as well as the damping system were determined by differential evolution optimization technique. The faults were identified, both in magnitude and location (phase) using correlation analysis of the rotor outputs measured at the disc linear degrees of freedom. In order to avoid computational costs, Guyan order reduction method was employed and the identification used the reduced rotor model. Several experiments were performed considering different unbalance configurations and the proposed procedure proved consistent in identifying two faults that occur simultaneously and have similar symptoms.
Keywords
Faults identification, Correlation analysis, Model order reduction, Rotor Dynamics
