Vibratory Response of a Rotating Disk Incorporating Image Derotation Techniques and Holographic Interferometry.

Abstract

This report covers work carried out at AFAPL's Turbo Structures Research Laboratory (TSRL) on the vibratory response of an internally clamped annular disk under both static and rotational conditions. Standard holographic interferometry was used to experimentally determine the frequencies and mode shapes of a 10 inch disk under nonrotating conditions. Incorporating an image derotator and double-pulsed ruby laser, resonant conditions and mode shapes were again determined, but this time the interferograms were constructed while the disk was rotating at specified speeds. The finite element computer program NASTRAN was used to model the steel disk and analytically determine the mode shapes and frequencies as a function of speed. The analytical frequency predictions were compared to the experimental results and found to deviate by about 4%. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1978
Accession Number
ADA062671

Entities

People

  • James C. Macbain
  • John E. Horner
  • William A. Strange

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Force
  • Computer Programs
  • Finite Element Analysis
  • Frequency
  • Laser Beams
  • Lasers
  • Light Sources
  • Numerical Analysis
  • Orientation (Direction)
  • Photographic Plates
  • Pulsed Lasers
  • Resonant Frequency
  • Ruby Lasers
  • Shape
  • Standards
  • Test Equipment
  • Turbines

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Optical Physics and Photonics.
  • Structural Dynamics.

Technology Areas

  • Directed Energy