Article (Scientific journals)
Nonlinear modal analysis of frictional ring damper for compressor blisk
Sun, Yekai; Yuan, Jie; Denimal, Enora et al.
2021In Journal of Engineering for Gas Turbines and Power, 143 (3)
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Keywords :
Dampers; Friction; Modal analysis; Compressors; Finite element model; Nonlinear vibration
Abstract :
[en] The use of integrally blisk is becoming popular because of the advantages in aerodynamic efficiency and mass reduction. However, in an integrally blisk, the lack of the contact interface leads to a low structural damping compared to an assembled bladed disk. One emerging damping technique for the integrally blisk is based on the use of friction ring damper, which exploits the contact interfaces at the underneath of the disk. In this paper, three different geometries of the ring dampers are investigated for damping enhancement of a blisk. A full-scale compressor blisk is considered as a case study where a node-to-node contact model is used to compute the contact forces. The dynamic behavior of the blisk with the ring damper is investigated by using nonlinear modal analysis, which allows a direct estimation of the damping generated by the friction interface. The damping performance for the different ring dampers is evaluated and compared. It appears that the damping efficiency as well as the shift in the resonant frequency for the different geometries is highly related to the nodal diameter and contact pressure/gap distributed within contact interface. The geometry of the ring damper has significant impact on the damping performance.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Sun, Yekai
Yuan, Jie
Denimal, Enora
Salles, Loïc  ;  Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Imperial College London > Mechanical Engineering > Vibration University Technology Centre
Language :
English
Title :
Nonlinear modal analysis of frictional ring damper for compressor blisk
Publication date :
2021
Journal title :
Journal of Engineering for Gas Turbines and Power
ISSN :
0742-4795
eISSN :
1528-8919
Volume :
143
Issue :
3
Peer reviewed :
Peer Reviewed verified by ORBi
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