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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

A Comparison of Two Finite Element Reduction Techniques for Mistuned Bladed Disks

[+] Author and Article Information
F. Moyroud, T. Fransson

Royal Institute of Technology, Chair of Heat and Power Technology, Brinellvägen 60, S100 44 Stockholm, Sweden

G. Jacquet-Richardet

Institut National des Sciences Appliquées, Laboratoire de Mécanique des Structures, 20 Avenue Albert Einstein, 69 621 Villeurbanne Cedex, Francee-mail: jacquet@lmst.insa-lyon.fr

J. Eng. Gas Turbines Power 124(4), 942-952 (Sep 24, 2002) (11 pages) doi:10.1115/1.1415741 History: Received November 01, 1999; Revised February 01, 2000; Online September 24, 2002
Copyright © 2002 by ASME
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References

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Figures

Grahic Jump Location
First mode shape of the mistuned AXI plate (ε0=+10 percent). 0 indicates the reference sector.
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Comparison of lowest 78 modes of the mistuned AXI plate (ε0=+10 percent) with and without reduction
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Comparison of first natural frequency of the AXI plate as a function of ε0
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First mode shape of the mistuned CYCL plate (ε0=−10 percent). 0 indicates the reference sector.
Grahic Jump Location
Comparison of lowest 78 modes of the mistuned CYCL plate (ε0=−10 percent) with and without reduction
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Comparison of first natural frequency of the CYCL plate as a function of ε0
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(a) 12 deg sectorial mesh and Craig and Bampton substructure, (b) full assembly mesh
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Axial component of the second mode shape (1B-1D) at 8000 rpm for the tuned bladed disk, CBSR model
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Axial component of the second mode shape at 8000 rpm for partial mistuning with ε0=−10 percent, CBSR model. 0 indicates the reference sector.
Grahic Jump Location
Axial component of the second mode shape at 0 rpm for partial mistuning with ε0=+10 percent, CBSR model. 0 indicates the reference sector.
Grahic Jump Location
Axial component of the second mode shape at 0 rpm for partial mistuning with ε0=−10 percent, CBSR model. 0 denotes the reference sector.
Grahic Jump Location
Lowest 210 natural frequencies predicted with CBSR reduced-order model of the full assembly at rest, solid line: tuned, dashed line: ε0=−10 percent, dotted line: ε0=+10 percent, dotted-dashed line: alternate ten percent mistuning

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