Testing of turbine engine components to verify structural durability goals is performed in a variety of ways and at a variety of facilities. Further, methods used differ between engine companies and even among engine programs within the same company. A recent emphasis on reducing high cycle fatigue (HCF) failures of engine components has made it obvious that improvements and standardization of HCF test methods are needed. This paper presents findings from an assessment of current HCF test approaches and identifies weaknesses that form the basis for recommending improvements. Weaknesses identified included data processing, mode identification, and selection of instrumentation locations.
Issue Section:
Gas Turbines: Manufacturing, Materials, and Metallurgy
Topics:
Blades,
Engines,
Gages,
Gas turbines,
High cycle fatigue,
Stress,
Testing,
Rotors,
Failure,
Instrumentation,
Strain gages
1.
Heiser
, W. H.
, and May
, R.
, 1996, “U.S. Air Force Engine Management…A Cradle-to Grave Process,” Global Gas Turb. News, 36, No. 2, p. 9.2.
Thompson
, D. E.
, and Griffin
, J. T.
, 1999, “The National Turbine Engine High Cycle Fatigue Program,” Global Gas Turb. News, 39, No. 1, pp. 14–17.3.
Purcell
, T. E.
, 1996
, “Dynamic Stress Analysis of Gas Turbine Rotor Airfoils Using Thermoelastic Techniques
,” Exp. Tech.
, May/June, pp.
9
–13
.4.
Tibbals, T. F., Bapty, T. A., and Abbot, B. A., 1994, “CADDMAS: A Real-Time Parallel System for Dynamic Data Analysis,” ASME Paper No. 94-GT-194.
5.
Tibbals, T. F., Sensmeier, M. D., Nichol, K. L., Stoner, A., and Biegl, C., 1999, “Model Integrated Testing for Durability Assessment of Turbine Engines,” ITEA Conference Proceedings, University of Tennessee Space Institute, Tullahoma, TN, Oct.
6.
Griffin
, J. H.
, and Hoosac
, T. H.
, 1984
, “Model Development and Statistical Investigation of Turbine Blade Mistuning
,” ASME J. Vib. Acoust., Stress Reliab. Des.
, 106
, pp. 204
–210
.7.
Ottarsson, G. S., Castanier, M. P., and Pierre, C., 1999, “A Reduced-Order Modeling Technique for Mistuned Bladed Disk,” Proceedings of the 35th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference.
8.
Nichol, K. L., 1998, “Numerical Strain Gage Representation,” Proceedings of the 39th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Long Beach, CA, Apr.
9.
Sensmeier, M. D., and Nichol, K. L., 1998, “Minimizing Vibratory Strain Measurement Error,” Proceedings of the 43rd ASME Gas Turbine and Aeroengine Congress, Stockholm, Sweden, June.
10.
Jones, H. T., 1985, “Development of Noninterference Technique for Measuring Turbine Engine Rotor Blade Stresses, AIAA Paper 85-1472.
11.
Watkins, A. B., Robinson, W. W., and Chi, R. M., 1985, “Noncontact Vibration Measurement and Analysis,” AIAA Paper No. 85-1473.
12.
Nichol, K. L., Sensmeier, M. D., and Tibbals, T. F., 1999, “Assessment of Turbine Engine Structural Integrity Using the Structural Dynamic Response Analysis Code (SDRAC),” ASME Paper No. 99-GT-410.
Copyright © 2002
by ASME
You do not currently have access to this content.