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International Journal of Rotating Machinery
Volume 6 (2000), Issue 4, Pages 265-273
http://dx.doi.org/10.1155/S1023621X00000257

Aeroelasticity in Turbomachines: Some Aspects of the Effect of Coupling Modeling and Blade Material Changes

1Laboratoire de Mécanique des Structures UPRESA CNRS, INSA de Lyon, Villeurbanne F-69100, France
2Division of Heat and Power Technology, Royal Institute of Technology, Stockholm S-IO0 44, Sweden

Received 4 September 1998

Copyright © 2000 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Two methods are generally used for the aeroelastic analysis of bladed-disc assemblies. The first, often referred to as the energy method, assumes that the fluid does not modify invacuum structural dynamic behavior. On the other hand, the second, based on an eigenvalue approach, considers the feedback effect of the fluid on the structure. In this paper, these methods are compared using different test cases, in order to highlight the limitations of the energy method. Within this comparison, the effect of material modifications on the coupled behavior of the assembly is examined.