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Vibrations of twisted cantilevered plates - Experimental investigationThe experimental portion of a joint government/industry/university research study on the vibrational characteristics of twisted cantilevered plates is presented. The overall purpose of the research study was to assess the capabilities and limitations of existing analytical methods in predicting the vibratory characteristics of twisted plates. Thirty cantilevered plates were precision machined at the Air Force's Aero Propulsion Laboratory. These plates, having five different degrees of twist, two thicknesses, and three aspect ratios representative of turbine engine blade geometries, were tested for their vibration mode shapes and frequencies. The resulting nondimensional frequencies and selected mode shapes are presented as a function of plate tip twist. The trends of the natural frequencies as a function of the governing geometric parameters are discussed. The effect of support compliance on the plate natural frequency and its impact on numerically modeling twisted plates is also presented.
Document ID
19840064150
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Macbain, J. C.
(USAF, Aero Propulsion Laboratory, Wright-Patterson AFB OH, United States)
Kielb, R. E.
(NASA Lewis Research Center Structural and Mechanical Technology Div., Cleveland, OH, United States)
Leissa, A. W.
(Ohio State University Columbus, OH, United States)
Date Acquired
August 12, 2013
Publication Date
June 1, 1984
Subject Category
Structural Mechanics
Report/Patent Number
ASME PAPER 84-GT-96
Accession Number
84A46937
Distribution Limits
Public
Copyright
Other

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