Key Features of the Transient Amplification of Mistuned Systems

[en] The dynamic behavior of bladed disks in resonance crossing has been intensively investigated in the community of turbomachinery, addressing the attention to (1) the transient-type response that appear when the resonance is crossed with a finite sweep rate and (2) the localization of the vibration in the disk due to the blade mistuning. In real conditions, the two mentioned effects coexist and can interact in a complex manner. This paper investigates the problem by means of analytic solutions obtained through asymptotic expansions, as well as numerical simulations. The mechanical system is assumed as simple as possible: a 2-dof linear system defined through the three parameters: damping ratio , frequency mistuning , rotor acceleration  multiple-scale method.

Disciplines :

Mechanical engineering

Author, co-author :

Carassale, Luigi

Denoël, Vincent ; Université de Liège - ULiège > Département ArGEnCo > Analyse sous actions aléatoires en génie civil

Martel, Carlos

Panning-von Scheidt, Lars

Language :

English

Title :

Key Features of the Transient Amplification of Mistuned Systems

Publication date :

2021

Journal title :

Journal of Engineering for Gas Turbines and Power

ISSN :

0742-4795

eISSN :

1528-8919

Publisher :

American Society of Mechanical Engineers

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 19 January 2021

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Bibliography

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