Study of the higher-order Lamb resonances on elastic shells: their     prediction and interpretation

Michael F. Werby; M. K. Broadhead

doi:10.1117/12.138276

16 September 1992 Study of the higher order Lamb resonances on elastic shells: their prediction and interpretation

Michael F. Werby, M. K. Broadhead

Proceedings Volume 1700, Automatic Object Recognition II; (1992) https://doi.org/10.1117/12.138276
Event: Aerospace Sensing, 1992, Orlando, FL, United States

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 A_i and S_i 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.

Citation Download Citation

Michael F. Werby and M. K. Broadhead "Study of the higher order Lamb resonances on elastic shells: their prediction and interpretation", Proc. SPIE 1700, Automatic Object Recognition II, (16 September 1992); https://doi.org/10.1117/12.138276

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