Drgania własne pakietów łopatek turbinowych z nieciągłym bandażem

Turbine blades milled with an element of a shroud ring may be grouped into packets. A relative position of the shroud ring elements determines dynamical properties of the system. In this report, results of numerical calculations are compared with the effects of experimental investigations in the range of natural frequences and natural mode shapes for a blade packet model with non-continuous shroud ring. A good agreement of calculations and experimental measurements was emphasized for a theoretical model with additional degrees of freedom at contact places of the shroud ring.