Modal Testing of Rotors with Rotating Machinery

Abstract

The modal testing theory for rotors with rotating asymmetry is briefly discussed, and the modal testing procedure for the rotor with shaft stiffness asymmetry is demonstrated using a magnetic exciter equipped with Hall sensors which measure the excitation forces. It is shown experimentally that the oneexciter/ two-sensor technique for complex modal testing of asymmetric rotors is superior to the standard two-exciter/two-sensor technique in terms of practicality and realization.