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Proceedings Paper

Study of the higher-order Lamb resonances on elastic shells: their prediction and interpretation
Author(s): Michael F. Werby; M. K. Broadhead
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Paper Abstract

We study all the resonances generated on elastic shells for a ka from 0 to 500 for steel and aluminum for a thickness of 5%. We observe the lowest order symmetric and antisymmetric model or Lamb resonances, waterborne and pseudo-Stoneley resonances and the higher order Lamb modes Ai and Si where i equals 1, 2, 3 . . .. We plot some of the phase velocities of some of the relevant resonances out to a ka of 500 and indicate simple expressions that predict the onset of each of the resonances. We demonstrate by use of partial wave analysis that the new expressions that predict the onset (critical frequencies) of the highest order Lamb modes are reliable. Further, interesting phenomena occur at the inception of some of the resonances and we discuss some of those cases.

Paper Details

Date Published: 16 September 1992
PDF: 9 pages
Proc. SPIE 1700, Automatic Object Recognition II, (16 September 1992); doi: 10.1117/12.138276
Show Author Affiliations
Michael F. Werby, Naval Research Lab. (United States)
M. K. Broadhead, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 1700:
Automatic Object Recognition II
Firooz A. Sadjadi, Editor(s)

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