Nonlinear Modal Analysis of Frictional Ring Damper for Compressor Blisk

Abstract The use of integrally blisk is becoming popular because the advantages in aerodynamic efficiency and mass reduction. However, an blisk, lack contact interface leads to a low structural damping compared assembled bladed disk. One emerging technique for based on friction ring damper, which exploits interfaces at underneath In this paper, three different geometries dampers are investigated enhancement blisk. A full-scale compressor considered as case study where node-to-node model used compute forces. dynamic behavior with damper by using nonlinear modal analysis, allows direct estimation generated interface. performance evaluated compared. It appears that well shift resonant frequency highly related nodal diameter pressure/gap distributed within geometry has significant impact performance.