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Vibration analysis of a spinning disk using image-derotated holographic interferometry

A disk rotating at speeds up to 8000 rpm is analyzed for its resonant modes of vibration as a function of rpm using pulsed-laser holography in conjunction with an image derotator

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Abstract

This paper reports on the application of image-derotated holographic interferometry to study the resonant response of a rotating steel disk at speeds up to 8000 rpm. The rotational motion of the disk is optically removed by passing the image of the rotating disk through a prism that is traveling at half the rotational speed of the disk. Off-axis, double-pulsed, laser holography is then used to record the disk resonant-vibratory response. The first five diametrical modes and one complex mode of disk vibration are obtained at various rpm. The effects of disk imbalance, misalignment of optical and mechanical axes of rotation and system-excited modes of vibration are also addressed. Selected experimental results are compared to those obtained using finite element analysis.

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Authors and Affiliations

  1. Air Force Aero Propulsion Laboratory, Turbine Engine Division, Wright-Patterson AFB, 45433, OH

    J. C. MacBain (Project Engineer), J. E. Horner (Project Engineer) & W. A. Stange (Project Engineer)

  2. Aeronautical Systems Division, Structural Durability Division, Wright-Patterson AFB, 45433, OH

    J. S. Ogg (Project Engineer)

Authors
  1. J. C. MacBain
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  2. J. E. Horner
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  3. W. A. Stange
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  4. J. S. Ogg
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MacBain, J.C., Horner, J.E., Stange, W.A. et al. Vibration analysis of a spinning disk using image-derotated holographic interferometry. Experimental Mechanics 19, 17–22 (1979). https://doi.org/10.1007/BF02327765

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  • DOI: https://doi.org/10.1007/BF02327765

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