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Designing Complex Turbo Rotor Systems with Controlled Vibration Characteristics
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English
Abstract
Vibration problems with turborotors become more troublesome as machine speeds increase. Designers of today realize that the era of placing rotor critical speeds above the maximum operating speed of the equipment is long past. The dynamic system, being composed of the rotor, bearings, support structure, and even other rotors within the same machine, together with all of the excitations and damping forces significant to the dynamic problem must be understood and manipulated in a manner to make operation reliable. Today’s careful control of these parameters can prevent tomorrow’s problems.
Lycoming has developed a method that takes into account all of the significant parameters and predicts the effect of a design change on the rotor system dynamics. In addition to being used to study the effect of controlled design changes, without performing costly tests, this method has been used to predict full engine frequency response characteristics and thereby to help avoid vibration problems in the field.
Authors
Citation
Bohm, R., "Designing Complex Turbo Rotor Systems with Controlled Vibration Characteristics," SAE Technical Paper 640379, 1964, https://doi.org/10.4271/640379.Also In
References
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- Fassel, Robert “Bearing Loading and Fatigue of Shaft and Housing in Turbomachines.” A translation from the technical paper Luftfahrtechnik No. 12 December 1962
- Bishop, R. E. D. Johnson, D. B. “The Mechanics of Vibration.” Cambridge Univ. Press 1960
- Marguree, K. “Vibration and Stability Problems of Beams Treated by Matrices,” J. of Mathematics and Physics XXXV April 1956
- Pestel, Edward C. Leckie, Frederick A. “Matrix Methods in Elastomechanics.” New York McGraw-Hill Book Co., Inc. 1963
- Harris Crede “Vibration Handbook,” Chapter 28, by Crandall and McCalley New York McGraw-Hill Book Co., Inc. 1961