A series of research programs with small-diameter, supercritical-speed power-transmission shafting has led to the development of design techniques for the application of one or two viscous dampers to control shaft vibrations through as many as 20 critical speeds. These techniques have been used to design a large, 338.5-in-long helicopter rotor synchronizing shaft using aluminum tubing with an outside diameter of 4.50 in. and a wall thickness of 0.12 in. A single viscous damper located 30.0 in. from one end of the shaft has been used to successfully operate the shaft through its first five critical speeds. The design parameters and experimental results for this shaft are discussed, along with a description of the application of modal balancing at the third, fourth, and fifth critical speeds.
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November 1967
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Journal of Engineering for Industry
Research Papers
The Design and Evaluation of a Supercritical-Speed Helicopter Power-Transmission Shaft
R. H. Prause,
R. H. Prause
Machine Dynamics Division, Columbus Laboratories, Battelle Memorial Institute, Columbus, Ohio
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H. C. Meacham,
H. C. Meacham
Machine Dynamics Division, Columbus Laboratories, Battelle Memorial Institute, Columbus, Ohio
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J. E. Voorhees
J. E. Voorhees
Machine Dynamics Division, Columbus Laboratories, Battelle Memorial Institute, Columbus, Ohio
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R. H. Prause
Machine Dynamics Division, Columbus Laboratories, Battelle Memorial Institute, Columbus, Ohio
H. C. Meacham
Machine Dynamics Division, Columbus Laboratories, Battelle Memorial Institute, Columbus, Ohio
J. E. Voorhees
Machine Dynamics Division, Columbus Laboratories, Battelle Memorial Institute, Columbus, Ohio
J. Eng. Ind. Nov 1967, 89(4): 719-727
Published Online: November 1, 1967
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Received:
December 1, 1966
Online:
August 25, 2011
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Prause, R. H., Meacham, H. C., and Voorhees, J. E. (November 1, 1967). "The Design and Evaluation of a Supercritical-Speed Helicopter Power-Transmission Shaft." ASME. J. Eng. Ind. November 1967; 89(4): 719–727. https://doi.org/10.1115/1.3610142
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