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Experimental Mechanics

, Volume 8, Issue 9, pp 385–391 | Cite as

An experimental model for studying dynamic responses of a rotating beam under spatially distributed random excitation

A detailed description is given of an apparatus designed to investigate lateral dynamic responses of a rotating beam to spatially distributed harmonic and random excitation
  • D. D. Kana
  • L. M. Yeakley
  • J. F. Dalzell
Article

Abstract

A detailed description is given of an experimental apparatus which has been designed to investigate lateral dynamic responses of a rotating beam to spatially distributed harmonic and random excitation. In essence, the apparatus represents a laboratory model of an articulated helicopter rotor blade. Particular emphasis is placed on the design of the beam itself, and on multiple electromagnetic exciters which have been built integral with the beam. This unique aspect of the apparatus is the heart of the design of the entire system. Measurements of input and output data, which will be performed in subsequent work, will allow verification of the adequacy of the basic assumptions of linear-random-process theory as applied to beams, as well as allow a comparison with several existing beam theories that can be utilized to describe responses of beams under random loading.

Keywords

Mechanical Engineer Experimental Model Fluid Dynamics Dynamic Response Output Data 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Dalzell, J. F., and Gormley, J. F., “Preliminary Literature Survey: Studies of the Structural Response of Simulated Helicopter Rotor Blades to Random Excitation,” Interim Technical Report No. 1, Contract DA-31-124-ARO-D-375 (Sept. 1965).Google Scholar
  2. 2.
    Trubert, M. R. P., “Response of Elastic Structures to Statistically Correlated Multiple Random Excitations,”Jnl. Acous. Soc. Am.,35 (7),1009–1022 (July 1963).Google Scholar
  3. 3.
    Dalzell, J. F., and Yeakley, L. M., “An Experimental Study of the Response of a Cantilever Plate to Random Excitation,” Final Report, Project 02-1456(IR), Southwest Research Institute (Nov. 1965).Google Scholar
  4. 4.
    Crandall, S. H., andYidkiz, A., “Randon Vibration of Beams,”Jnl. Appl. Mech.,29,267–275 (June 1962).Google Scholar
  5. 5.
    Bendat, J. S., andPiersol, A. G., “Measurement and Analysis of Random Data,”John Wiley & Sons, Inc., New York (1966).Google Scholar
  6. 6.
    Wood, E. R., Hilzinger, K. D., and Buffalano, A. C., “An Aeroelastic Study of Helicopter Rotor Systems in High Speed Flight,” CAL/TRECOM Symposium Proceedings, Dynamic Load Problems Associated with Helicopters and V/STOL Aircraft, Buffalo, N. Y. (June 26–28, 1963).Google Scholar
  7. 7.
    Timoshenko, S.Vibration Problems in Engineering,”D. Van Nostrand Company, Inc., New York (1928).Google Scholar
  8. 8.
    Yntema, R. T., “Simplified Procedures and Charts for the Rapid Estimation of Bending Frequencies of Rotating Beams,” NACA TN 3459 (June 1955).Google Scholar

Copyright information

© Society for Experimental Mechanics, Inc. 1968

Authors and Affiliations

  • D. D. Kana
    • 1
  • L. M. Yeakley
    • 1
  • J. F. Dalzell
    • 2
  1. 1.Southibest Research Institute SanAntonio
  2. 2.Hydronautics, Inc.Laurel

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