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Proceedings Paper

Reference-free mode shape identification with a continuously scanning laser Doppler vibrometer (SLDV)
Author(s): Yuen Kim Ho; David J. Ewins
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Paper Abstract

This paper present an analysis technique that uses vibration response data from a continuously Scanning Laser Doppler Vibrometer (SLDV) to determine both the mode shape modulus and the temporal phase relationships by means of the Time Domain Fourier Filter Output method. Verification of this technique is first performed using numerically generated data from the exact solution of a cantilever beam, to simulate experimental measurements with the SLDV. Finally, an experiment is presented to show that this technique works well for determining both the modulus and the temporal phase of mode shapes using only the velocity output form an SLDV without any reference force signal.

Paper Details

Date Published: 13 June 2001
PDF: 6 pages
Proc. SPIE 4317, Second International Conference on Experimental Mechanics, (13 June 2001); doi: 10.1117/12.429545
Show Author Affiliations
Yuen Kim Ho, Imperial College of Science, Technology and Medicine (United Kingdom)
David J. Ewins, Imperial College of Science, Technology and Medicine (United Kingdom)


Published in SPIE Proceedings Vol. 4317:
Second International Conference on Experimental Mechanics
Fook Siong Chau; Chenggen Quan, Editor(s)

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