Accession Number : ADP005546

Title :   Vibration Analysis by Speckle Interferometry,

Corporate Author : MOTOREN- UND TURBINEN-UNION G M B H MUNICH (GERMANY F R)

Personal Author(s) : Knoell,Hartwig

Report Date : NOV 1986

Pagination or Media Count : 9

Abstract : 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.

Descriptors :   *OPTICAL INTERFEROMETERS, *VIBRATION, JET ENGINES, COMPRESSOR BLADES, CENTRIFUGAL COMPRESSORS, IMPELLERS, HELIUM NEON LASERS, WEST GERMANY

Subject Categories : Test Facilities, Equipment and Methods
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE