Three Dimensional Analysis Of Volume Vibrations By Electronic Speckle Pattern Interferometry

M. C. Shellabear; J. R . Tyrer

doi:10.1117/12.952923

31 July 1989 Three Dimensional Analysis Of Volume Vibrations By Electronic Speckle Pattern Interferometry

M. C. Shellabear, J. R . Tyrer

Proceedings Volume 1084, Stress and Vibration: Recent Developments in Industrial Measurement and Analysis; (1989) https://doi.org/10.1117/12.952923
Event: Sira/Stress and Vibration: Recent Developments in Measurement and Analysis, 1989, London, United Kingdom

Abstract

There are many situations in vibration analysis where it is necessary or desirable to make three-dimensional measurements. By using three different illumination geometries around a single imaging system, Electronic Speckle Pattern Interferometry (ESPI) can be used to measure the orthogonal components of vibration amplitude independently. These can be combined to determine the three-dimensional mode shape. The theory is given for making quantitative measurements, and a practical system is described. Examples of experimental results are presented for volume vibrations of a thick cylinder, identification of vibration modes of a turbocharger blade, and observation of in-plane modes in a thin plate.

Citation Download Citation

M. C. Shellabear and J. R . Tyrer "Three Dimensional Analysis Of Volume Vibrations By Electronic Speckle Pattern Interferometry", Proc. SPIE 1084, Stress and Vibration: Recent Developments in Industrial Measurement and Analysis, (31 July 1989); https://doi.org/10.1117/12.952923

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