Mode localization in a rotating mistuned turbo disk with Coriolis effect

An investigation of the speed effect, i.e., the effects of centrifugal and Coriolis forces, on the mode localization of a mistuned blade-disk is prese nted in this paper. A disk comprising of periodically shrouded blades is us ed to simulate the weakly coupled periodic structure. Galerkin method is em ployed to derive the mode localization equations of the mistuned system wit h the consideration of Coriolis force. The blades are approximated as canti lever beams, and five axial and lateral modes of each blade are used to pre sent the dynamic behavior of the system. Ten modal coordinates have been co nsidered for each blade. The effects of Coriolis force and the magnitude of disorder on the localization phenomenon of a rotating blade-disk system we re investigated numerically. Numerical results obtained herein indicate tha t the Coriolis force may enhance the localization phenomenon. (C) 2001 Else vier Science Ltd. All rights reserved.