Investigation of the influence of aerodynamic coupling on response levels of mistuned bladed discs with weak structural coupling

Sladojević, I, Petrov, E P, Sayma, A I, Imregun, M and Green, J S (2005) Investigation of the influence of aerodynamic coupling on response levels of mistuned bladed discs with weak structural coupling. In: ASME Turbo Expo 2005: Power for Land, Sea, and Air (GT2005), Jun 06-09, 2005, Reno, NV, USA.

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Abstract

The paper summarises the results of a study investigating the correlation between the aerodynamic blade-to-blade coupling in mistuned bladed disc assemblies and the level of forced response. The focus was placed on the torsional mode of vibration, where blades' coupling through the disc is weak, exposing the effects of aerodynamic coupling. The forced response of a large number of mistuned discs was computed, using whole-annulus finite element (FE) models. The unsteady aerodynamic forces that act upon the disc were calculated using a three-dimensional Reynolds-averaged Navier-Stokes CFD code. The results show the difference in response with and without aerodynamic coupling, exposing higher blade-to-blade interaction in the latter case. The statistical results show the change of the forced response distribution curves with the introduction of aero-coupling and their deviation from Gaussian distribution

Item Type: Conference or Workshop Item (Paper)
Additional Information: Volume 4: Turbo Expo 2005 ISBN: 0791847276
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TJ Mechanical engineering and machinery
Depositing User: Yevgen Petrov
Date Deposited: 27 Nov 2012 07:09
Last Modified: 27 Nov 2012 07:41
URI: http://sro.sussex.ac.uk/id/eprint/42999
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