Abstract

This paper deals with the development of a procedure to model geometric variations of blades. Specifically, vibratory parameters of blades are extracted from coordinate measurement machine (CMM) data on an integrally bladed rotor (IBR). The method is based on a proper orthogonal decomposition of CMM data, solid modeling, and finite element techniques. In addition to obtaining natural frequencies and mode shapes of each blade on an IBR, statistics of these modal parameters are also computed and characterized. Numerical results are validated by comparison with experimental results.

Issue Section:
Research Papers
Keywords:
coordinate measuring machines, blades, rotors, solid modelling, finite element analysis, mechanical engineering computing, vibrations
Topics:
Blades, Coordinate measuring machines, Machinery, Rotors, Principal component analysis

References

1.
Wu
,
C. Y.
, 1995, “
Arbitrary Surface Flank Milling of Fan, Compressor, and Impeller Blades
,”
J. Eng. Gas Turbines Power
1528-8919,
117
, pp.
534
–
539
.
Crossref
Search ADS
 
2.
Judge
,
J.
,
Pierre
,
C.
, and
Ceccio
,
S. L.
, 2001, “
Identification of Mistuning in Blisks
,”
Proceedings of the Sixth National High Cycle Fatigue (HCF) Conference
,
Jacksonville
, FL.
3.
Feiner
,
D.
, and
Griffin
,
J. H.
, 2003, “
Mistuning Identification of Bladed Disks Using a Fundamental Mistuning Model. Part I. Theory
,
J. Eng. Gas Turbines Power
, 1528-8900,
126
pp.
150
–
158
;
Feiner
,
D.
, and
Griffin
,
J. H.
, 2003, “
Mistuning Identification of Bladed Disks Using a Fundamental Mistuning Model. Part II. Application
,”
J. Eng. Gas Turbines Power
, 1528-8900,
126
pp.
159
–
165
.
4.
Blair
,
A.
, and
Annis
,
C.
, 2002, “
Development of Probabilistic Methods for Campbell Diagram Frequency Placement
,”
Proceedings of the Seventh National Turbine Engine High Cycle Fatigue Conference
, Palm Beach, FL.
5.
Garzon
,
V. E.
, and
Darmofal
,
D. L.
, 2003, “
Impact of Geometric Variability on Axial Compressor Performance
,”
J. Eng. Gas Turbines Power
, 1528-8900,
125
pp.
692
–
703
.
6.
Ghiocel
,
D. M.
, 2001, “
Stochastic Field Models for Aircraft Jet Engine Applications
,”
J. Aerosp. Eng.
0893-1321,
14
(
4
), pp.
127
–
139
.
Crossref
Search ADS
 
7.
Brown
,
J. M.
,
Slater
,
J.
, and
Grandhi
,
R. V.
, 2003, “
Probabilistic Analysis of Geometric Uncertainty Effects on Blade Modal Response
,” ASME Paper No. GT2003–3855.
8.
Ghanem
,
R. G.
, and
Spanos
,
P. D.
, 1991,
Stochastic Finite Elements: A Spectral Approach
,
Springer
, New York.
Copyright © 2008
 by American Society of Mechanical Engineers
You do not currently have access to this content.