Vibration Analysis by Speckle Interferometry,
MOTOREN- UND TURBINEN-UNION G M B H MUNICH (GERMANY F R)
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The vibrational modes of complex systems can be visualized with high sensitivity by laser light speckle interferometry. Electronic speckle pattern interferometry ESPI, in contrast to holography, does not use photo-chemical storage media but shows a live image of the vibrational modes created by the time-average method directly on a monitor screen. The particular advantage of this very useful and now almost conventional procedure of vibration analysis is demonstrated by two applications to aero-engine parts an intermediate pressure compressor IPC blade and an impeller of a small centrifugal compressor.
- Test Facilities, Equipment and Methods