Nonlinear modal analysis and energy localization in a bladed disk assembly

Georgiades, Fotios; Peeters, Maxime; Kerschen, Gaëtan; Golinval, Jean-Claude; Ruzzenne, Massimo

doi:10.1115/GT2008-51388

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Nonlinear modal analysis and energy localization in a bladed disk assembly

Georgiades, Fotios; Peeters, Maxime; Kerschen, Gaëtan et al.

2008 • In ASME Turbo Expo 2008: Power for Land, Sea and Air, Berlin, 2008

Peer reviewed

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https://hdl.handle.net/2268/18258

DOI
10.1115/GT2008-51388

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Keywords :

NONLINEAR MODAL ANALYSIS; ENERGY LOCALIZATION; BLADED DISK ASSEMBLY

Abstract :

[en] The objective of this study is to carry out modal analysis of nonlinear periodic structures using nonlinear normal modes (NNMs). The NNMs are computed numerically with a method developed in [18] that is using a combination of two techniques: a shooting procedureand a method for the continuation of periodic motion. The proposed methodology is applied to a simplified model of a perfectly cyclic bladed disk assembly with 30 sectors. The analysis shows that the considered model structure features NNMs characterized by strong energy localization in a few sectors. This feature has no linear counterpart, and its occurrence is associated with the frequencyenergy dependence of nonlinear oscillations.

Disciplines :

Physics
Mechanical engineering
Computer science
Mathematics

Author, co-author :

Georgiades, Fotios; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux

Peeters, Maxime ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures

Kerschen, Gaëtan ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux

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

Ruzzenne, Massimo; Georgia Institute of Technology Atlanta, Georgia > School of Aerospace Engineering

Language :

English

Title :

Nonlinear modal analysis and energy localization in a bladed disk assembly

Publication date :

June 2008

Event name :

ASME Turbo Expo 2008: Power for Land, Sea and Air

Event organizer :

ASME Gas Turbine Technical Congress and Exposition

Event place :

Berlin, Germany

Event date :

June 9-13, 2008

Audience :

International

Main work title :

ASME Turbo Expo 2008: Power for Land, Sea and Air, Berlin, 2008

Peer reviewed :

Peer reviewed

Available on ORBi :

since 10 August 2009

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