FINITE ELEMENT ANALYSIS FOR DYNAMIC BEHAVIOR OF GROUP OF STREAM TURBINE BLADE WITH FIN HEAVE

This paper considers the steam turbine blade group as a rotationally periodic structure and the complex constraint has been induced. The effect of the centrifugal force to the dynamic frenquency has been considered by introducing large deflection equation. A method has been given to introduce the special constraint between the fin heaves of every blade during dynamic analysing.