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

The Society of Naval Architects of Korea (대한조선학회)
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Acoustic Target Strength Analysis for Underwater Vehicles Covering Near Field Spherical Wave Source Originated Multiple Bounce Effects

근접장 구면파 소스의 다중 반사 효과를 고려한 수중함의 음향표적강도 해석

  • Cho, Byung-Gu (Dept. of Mechanical Engineering and Naval Architecture, R.O.K. Naval Academy) ;
  • Hong, Suk-Yoon (Dept. of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Kwon, Hyun-Wung (Dept. of Naval Architecture and Ocean Engineering, Seoul National University)
  • 조병구 (해군사관학교 기계조선공학과) ;
  • 홍석윤 (서울대학교 조선해양공학과) ;
  • 권현웅 (서울대학교 조선해양공학과)
  • Published : 2010.04.20
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Abstract

For the analysis of Acoustic Target Strength(TS) that indicates the scattered acoustic intensity from the underwater vehicles, an analysis program that is applicable to scatterers insonified by spherical wave source in near field is developed. In this program, the Physical Optics(PO) method is embedded as a base component. To increase the accuracy of the program, multiple bounce effects based on Geometrical Optics(GO) method are applied. To implement multiple bounce effects, GO method is used together with PO method. In detail, GO method has a concern in the evaluation of the effective area, and PO method is involved in the calculation of Acoustic Target Strength for the final effective area that is evaluated by GO method. For the embodiment of near field spherical wave source originated multiple bounce effects, image source concept is implemented additively to the existing multiple bounce algorithm which assumes plane wave insonification. Various types of models are tested to evaluate the reliability of the developed program and finally, a submarine is analyzed as an arbitrary scatterer.

Keywords

References

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