ABSTRACT
Operational Modal Analysis when applied to rotating machinery has issues that must be considered in order to have a satisfactory result. The focus of the paper is to identify modal parameters of a rotor with rolling bearings in an operational condition and compare it with a numerical model. In the experimental rotor, it is shown that only the operating condition without external excitation is not sufficient for OMA application and by applying simple techniques, without the need for input measurement and control, using both time and frequency domain, a comparison between experimental data and theoretical model showed good compliance for the identification of natural frequencies and damping factors.
