Experimental acoustic resonance study on finite length cylindrical targets
Identifieur interne : 001581 ( France/Analysis ); précédent : 001580; suivant : 001582Experimental acoustic resonance study on finite length cylindrical targets
Auteurs : F. Lecroq [France] ; J. L. Izbicki [France] ; G. Maze [France] ; J. Ripoche [France]Source :
- Physics Letters A [ 0375-9601 ] ; 1990.
Abstract
The acoustic resonances of cylindrical finite length targets are investigated experimentally. The targets have different length-to-diameter ratios η:η=1.33 for a solid aluminium cylinder, η=1.66 for an aluminium cylindrical shell (with a ratio between the inner radius b and the outer radius a of 0.89), η=1.85 for a stainless steel cylindrical shell ( b a=0.94). The insonification is performed at normal or slightly oblique incidence. Resonances related to Whispering Gallery, guided waves and Scholte-Stoneley waves are identified. For a given vibration mode n it is possible to identify two resonances at frequencies close to each other. A comparison is made with theoretical values at normal incidence. The experimental resonances related to Whispering Gallery and guided waves are shifted towards the high frequencies; resonances related to Scholte-Stoneley waves are shifted towards the low frequencies.
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DOI: 10.1016/0375-9601(90)90030-R
Affiliations:
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<front><div type="abstract" xml:lang="en">The acoustic resonances of cylindrical finite length targets are investigated experimentally. The targets have different length-to-diameter ratios η:η=1.33 for a solid aluminium cylinder, η=1.66 for an aluminium cylindrical shell (with a ratio between the inner radius b and the outer radius a of 0.89), η=1.85 for a stainless steel cylindrical shell ( b a=0.94). The insonification is performed at normal or slightly oblique incidence. Resonances related to Whispering Gallery, guided waves and Scholte-Stoneley waves are identified. For a given vibration mode n it is possible to identify two resonances at frequencies close to each other. A comparison is made with theoretical values at normal incidence. The experimental resonances related to Whispering Gallery and guided waves are shifted towards the high frequencies; resonances related to Scholte-Stoneley waves are shifted towards the low frequencies.</div>
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