Cyclic Finite Element Modeling of Shrouded Turbine Blades Including Frictional Contacts

Abstract

A new cyclic finite element model for shrouded blades is proposed. Using this technique, a contact area between the shrouds is computed with a good accuracy. Imposing a no-slip condition on the computed contact area, eigen-frequencies of the shrouded blades are calculated with very good agreement in relation to measurements. This method is verified with measurements of non-rotating and rotating bladed disc assemblies.