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dc.contributor.authorScandrett, C.L.
dc.contributor.authorVieira, A.M.
dc.dateSeptember 2013
dc.date.accessioned2016-04-20T21:44:26Z
dc.date.available2016-04-20T21:44:26Z
dc.date.issued2013-09
dc.identifier.citationJ. Acoust. Soc. Am., Vol. 134, No. 3 (September 2013), p. 1908-1919en_US
dc.identifier.urihttp://hdl.handle.net/10945/48437
dc.descriptionThe article of record as published may be found at http://dx.doi.org/10.1121/1.4816492en_US
dc.description.abstractBackscattering from a cloaked submerged spherical shell is analyzed in the low, mid, and high frequency regimes. Complex poles of the scattered pressure amplitudes using Cauchy residue theory are evaluated in an effort to explain dominant features of the scattered pressure and how they are affected by the introduction of a cloak. The methodology used is similar to that performed by Sammelmann and Hackman [J. Acoust. Soc. Am. 85, 114–124 (1989); J. Acoust. Soc. Am. 89, 2096–2103 (1991); J. Acoust. Soc. Am. 90, 2705–2717 (1991)] in a series of papers written on scattering from an uncloaked spherical shell. In general, it is found that cloaking has the effect of diminishing the amplitude and shifting tonal backscatter responses. Extreme changes of normal and tangential fluid phase velocities at the fluid–solid interface when cloaking is employed leads to elimination of the “mid-frequency enhancement” near the coincidence frequency for even modestly effective cloaks, while reduction of the “high-frequency enhancement” resulting from the “thickness quasi-resonance” near the cut-off frequency of the symmetric (SB2 ) mode requires more effective cloaking, but can be practically eliminated by employing a cloak that creates tangential acoustic velocities in excess of the SB2 mode phase speed near cutoff.en_US
dc.format.extent12 p.en_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleFluid-structure effects of cloaking a submerged spherical shellen_US
dc.typeArticleen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)en_US
dc.contributor.departmentApplied Mathematicsen_US


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