Influence of the inter‐stage coupling flexibility on the dynamics of multi‐stage rotors

Nyssen, Florence; Golinval, Jean-Claude

doi:10.1115/GT2016-57212

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Influence of the inter‐stage coupling flexibility on the dynamics of multi‐stage rotors

Nyssen, Florence; Golinval, Jean-Claude

2016 • In Proceedings of the ASME Turbo Expo 2016

Peer reviewed

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https://hdl.handle.net/2268/200401

DOI
10.1115/GT2016-57212

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Keywords :

Turbomachinery; Bladed disks; Multi-stage; Inter-stage coupling

Abstract :

[en] In this work, a characterization of the inter-stage coupling in a one-piece multi-stage bladed structure is performed. More particularly, the effect of the inter-stage coupling flexibility on the mode-shapes is evaluated. To this purpose, the MAC matrix between the mono-stage and multi-stage modes is computed for different drum Young’s modulus of the inter-stage coupling. In parallel, the strain energy located in the blades and in the connecting structure is computed for different levels of inter-stage coupling. This enables to establish a criterion to determine when a multi-stage finite element analysis is necessary instead of only computing the different mono-stage models separately. This criterion is based on the localization of the energy in the structure. Numerical analyses are performed on a two-stages academic bladed structure.

Disciplines :

Aerospace & aeronautics engineering

Author, co-author :

Nyssen, Florence ; Université de Liège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures

Golinval, Jean-Claude ; Université de Liège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures

Language :

English

Title :

Influence of the inter‐stage coupling flexibility on the dynamics of multi‐stage rotors

Publication date :

June 2016

Event name :

ASME Turbo Expo 2016

Event place :

Seoul, South Korea

Event date :

du 13 au 17 juin 2016

Audience :

International

Main work title :

Proceedings of the ASME Turbo Expo 2016

Peer reviewed :

Peer reviewed

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique

Available on ORBi :

since 15 July 2016

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