Multiple fault identification method in the frequency domain for rotor systems

Issue title: COBEM 2001

Article type: Research Article

Authors: Bachschmid, Nicolò | Pennacchi, Paolo

Affiliations: Politecnico di Milano, Dipartimento di Meccanica, Via La Masa, 34, I-20158, Milano, Italy

Note: [] Corresponding author. Tel.: +39 02 2399 8426; Fax: +39 02 2399 8492; E-mail: [email protected]

Abstract: Fault identification in rotor systems has been studied by many authors, but the considered malfunction is one single fault only, generally an unbalance. Real machines can be affected by several different types of faults; moreover sometimes also two different faults may develop simultaneously. A model based method for identifying multiple faults acting simultaneously on a rotor system in the frequency domain is briefly described and its robustness with regards to measuring and modelling errors is evaluated, by means of numerical simulations performed on the models of two typical power plant machines: a steam turbogenerator and a gas turbogenerator.

Keywords: rotordynamics, identification, multiple faults, residue map

Journal: Shock and Vibration, vol. 9, no. 4-5, pp. 203-215, 2002