Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Near-field Sonar Cross Section Analysis of Underwater Target Using Spherical Projection Method

구면투영법을 이용한 수중표적의 근거리장 소나단면적 해석

  • 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)
  • 김국현 ((주)한진중공업 특수선선체설계팀) ;
  • 조대승 (부산대학교 조선해양공학과)
  • Published : 2008.12.31
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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.

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References

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