구면투영법을 이용한 수중표적의 근거리장 소나단면적 해석
Near-field Sonar Cross Section Analysis of Underwater Target Using Spherical Projection Method
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
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.
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.
참고문헌 (12)
- Boo, S.Y, "Computation of RCS and TES of Curved Objects Using a Curved-Patch Physical Optics Method", J. of the Society of Naval Architects of Korea, 38(1), pp.62~71 (2001)
- Choi, Y.H, "Numerical Modeling and Experimental Verification for Target Strength of Submerged Objects", J. of Ocean Engineering and Technology, 19(1), pp.64~70 (2005)
- Jin, C, "Graphical Computational Method for Near-field Backscattering Problems,"", Journal of Electromagnetic Waves and Applications, 13, pp.227~235 (1999)
- 김국현, 김종철, 조대승, "수중표적에 대한 고주파수 음향산란 해석", 대한조선학회 논문집, 42(5), pp.528~533 (2005), 대한조선학회
- Klement, D, "Special Problems in Applying the Physical Optics Method for Aackscatter Computation of Complicated Objects", IEEE Trans. Ant. Prop, 36(2), pp.228~237 (1988)
- Knott, E.F, "Radar Cross Section Measurements" (1993), Van Nostrand Reinhold
- Legault, S.R, "Refining Physical Optics for Near-field Computations", Electronics Letters, 40(1), pp.71~72 (2004)
- A Case Study: Target Strength, "Technology Transfer", pp.1974, New, R
- Rius, J.M, "High-frequency RCS of Complex Radar Targets in Real-time", IEEE Trans. Ant. Prop, AP-41(2), pp.1308~1319 (1993)
- Schneider, H.G, "Acoustic Scattering by a Submarine: Results from a Benchmark Target Strength Simulation Workshop", ICSV10, pp.2474~2482 (2003)
- Tyler, G.D, "The Emergency of Low-frequency Active Acoustics for as a Critical Antisubmarine Warfare Technology", John Hopkins APL Technical Digest, 13(1), pp.145~159 (1992)
- Urick, R.J, "Principles of Underwater Sound, 3rd Ed" (1983), McGraw-Hill