Contribution to the dynamic behaviour of bladed disks

Abstract

At this time is dominant to design rotors as assembly of few separated bladed disks. Another type of design ordering is that blade buckle together with a part of shaft creates bladed disk. It is necessary to look on dynamic behaviour of this rotors not only as whole rotors, but also as individual bladed disks. This contribution deals with an analysis of dynamic behaviour of disks. The main for this analysis is acquaintance frequency-modal phenomenons at quiescent state. For modes excitation analysis in rotation, especially for bladed disks, is necessary to build ”full” model, it means whole disk, not only cyclic sector. Analysis in time domain presents numerical simulations of rotating bladed disks dynamic behaviour. In the mentioned case it ts possible to suppose steady operating state. The response to noted rotation speed change should be analysed too. In this paper is presented theoretic analysis of bladed disks and analysis of real bladed disk.