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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Blade Manufacturing Tolerances Definition for a Mistuned Industrial Bladed Disk

[+] Author and Article Information
E. Capiez-Lernout, C. Soize

Laboratory of Engineering Mechanics, University of Marne La Vallée, 5, Bd Descartes, 77454 Marne-la-Vallée Cedex, 02, France

J.-P. Lombard, C. Dupont

Snecma Moteurs, Site de Villaroche, 77550 Moissy Cramayel, France

E. Seinturier

Turbomeca—Snecma Group, Site de Bordes, 64511 Bordes Cedex, Francee-mail: eric.seinturier@turbomeca.fr

J. Eng. Gas Turbines Power 127(3), 621-628 (Jun 24, 2005) (8 pages) doi:10.1115/1.1850497 History: Received October 01, 2003; Revised March 01, 2004; Online June 24, 2005
Copyright © 2005 by ASME
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References

Figures

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Finite element mesh for the 22 blades fan stage
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Graph of the eigenfrequencies with respect to the circumferential wave number for the tuned structure
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Graph of function ns↦Conv2(ns,nd,nb) related to the stochastic dynamic equation with δMjDj=0 and δKj=0.05 and for nd=10 and nb=20
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Graph of function nb↦Conv2(300,nd,nb) for nd=10 (black solid line), for nd=7 (gray solid line), for nd=5 (black dashed–dotted line), for nd=4 (gray dashed–dotted line), for nd=3 (black dotted line), and for nd=2 (gray dotted line), related to the stochastic dynamic equation with δMjDj=0 and δKj=0.05
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Mesh of the nominal blade and definition of three section profiles
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Geometrical parameters of the tolerances: section Sk of the nominal blade (thick dashed-line) and of the manufactured blade (thick solid line). Location of the trailing edge (gray filled zone) with respect to the tolerances specifications.
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Section profiles for a realization of the manufactured blade with a zoom 20× (gray filled thin line) and for the nominal blade (thick line)
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Convergence with respect to the number ns of realizations: graph of function ns↦δ̃K(ns) for dLmin=−0.55 mm,dLmax=0.75 mm,αmax=−αmin=0.55 deg
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Convergence with respect to the number ns of realizations: graph of function ns↦δ̃M(ns) for dLmin=−0.55 mm,dLmax=0.75 mm,αmax=−αmin=0.55 deg
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Graph of the probability density function b↦pB(b) for dLmin=−0.55 mm and dLmax=0.75 mm,αmax=−αmin=0 deg
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Graph of the probability density function b↦pB(b) for dLmin=−0.55 mm and dLmax=0.75 mm,αmax=−αmin=0.35 deg
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Graph of the probability density function b↦pB(b) for dLmin=−0.55 mm and dLmax=0.75 mm,αmax=−αmin=0.55 deg
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Graph of αmax↦P(B>b) for several values of b=1.2 (black solid line), b=1.3 (gray solid line), b=1.4 (black dashed–dotted line), b=1.5 (gray dashed–dotted line), b=1.6 (black dotted line), and b=1.7 (gray dotted line)

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