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http://dx.doi.org/10.3744/SNAK.2008.45.6.695

Near-field Sonar Cross Section Analysis of Underwater Target Using Spherical Projection Method  

Kim, Kook-Hyun (Special Ship Hull Design Team, Hanjin Heavy Industries and Constructions Co. Ltd.)
Cho, Dae-Seung (Department of Naval Architecture and Ocean Engineering, Pusan National University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.45, no.6, 2008 , pp. 695-702 More about this Journal
Abstract
In this paper, a new numerical method is proposed to analyze near-field sonar cross section of acoustically large-sized underwater targets such as submarines. A near-field problem is converted to a far-field problem using a spherical projection method with respect to the objective target. Then, sonar cross section is calculated with a physical optics well established in far-field acoustic wave scattering problems. The analysis results of a square flat plate compared with those obtained by other method show the accuracy of the proposed method. Moreover, it is noted that the sonar cross section is varied with respect to the targeting point as well as the range. Finally, numerical analysis results of real-like underwater target such as a submarine pressure hull are discussed.
Keywords
Near-field; Sonar cross section; Spherical projection method; Physical optics;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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