Acoustic diffraction by deformed edges of finite length : theory and experiment


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dc.contributor.author Stanton, Timothy K.
dc.contributor.author Chu, Dezhang
dc.contributor.author Norton, Guy V.
dc.date.accessioned 2008-08-20T16:23:03Z
dc.date.available 2008-08-20T16:23:03Z
dc.date.issued 2007-12
dc.identifier.citation Journal of the Acoustical Society of America 122 (2007): 3167-3176 en
dc.identifier.uri http://hdl.handle.net/1912/2343
dc.description Author Posting. © Acoustical Society of America, 2007. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America 122 (2007): 3167-3176, doi:10.1121/1.2405126. en
dc.description.abstract The acoustic diffraction by deformed edges of finite length is described analytically and in the frequency domain through use of an approximate line-integral formulation. The formulation is based on the diffraction per unit length of an infinitely long straight edge, which inherently limits the accuracy of the approach. The line integral is written in terms of the diffraction by a generalized edge, in that the “edge” can be a single edge or multiple closely spaced edges. Predictions based on an exact solution to the impenetrable infinite knife edge are used to estimate diffraction by the edge of a thin disk and compared with calculations based on the T-matrix approach. Predictions are then made for the more complex geometry involving an impenetrable thick disk. These latter predictions are based on an approximate formula for double-edge diffraction [Chu et al., J. Acoust. Soc. Am. 122, 3177 (2007)] and are compared with laboratory data involving individual elastic (aluminum) disks spanning a range of diameters and submerged in water. The results of this study show this approximate line-integral approach to be versatile and applicable over a range of conditions. en
dc.description.sponsorship This research was supported by the U.S. Office of Naval Research (Grant No. N00014-02-0095), WHOI, and by a grant of computer time at the U.S. Department of Defense High Performance Computing Shared Resource Center (Naval Research Laboratory, Washington, DC). en
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Acoustical Society of America en
dc.relation.uri http://dx.doi.org/10.1121/1.2405126
dc.subject Acoustic wave diffraction en
dc.subject Frequency-domain analysis en
dc.subject Integral equations en
dc.subject Structural acoustics en
dc.title Acoustic diffraction by deformed edges of finite length : theory and experiment en
dc.type Article en
dc.identifier.doi 10.1121/1.2405126

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