A fast estimation of sonar cross section of acoustically large and complex underwater targets using a deterministic scattering center model

Kim, Kookhyun; Cho, Joon-Ho; Kim, Jin-Hyeong; Cho, Dae‐Seung

doi:10.1016/j.apacoust.2008.07.009

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…Therefore an efficient algorithm to find the illuminated surfaces should be adopted for more accurate analysis, particularly for complex underwater targets. In this paper, a hidden surface algorithm [10] with an adaptive triangular beam method [11] and a virtual surface concept [12,16] are adopted to explain shadow effects and multiple reflections among elements, respectively. Fig.…”

Section: Time Domain Physical Optics Formulation and Its Numerical Immentioning

confidence: 99%

Applying time domain physical optics to acoustic wave backscattering problem

Kim¹,

Kim²,

Cho³

et al. 2010

Applied Acoustics

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Section: Time Domain Physical Optics Formulation and Its Numerical Immentioning

confidence: 99%

Applying time domain physical optics to acoustic wave backscattering problem

Kim¹,

Kim²,

Cho³

et al. 2010

Applied Acoustics

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“…The numerical solution of the TS agrees well with the precise solution. Kookhyun [25] proposed a method of quickly estimating the sonar cross-sections of large and complex underwater targets such as Underwater vehicles and torpedoes. This method is based on the deterministic scattering center model, uses a combination of physical and geometric optics to construct a scattering center database, and then utilizes the database to perform polynomial interpolation on the incident angle to reconstruct the sonar cross-section.…”

Section: Introductionmentioning

confidence: 99%

Optimum design of acoustic stealth shape of underwater vehicle model with conning tower

Tang¹,

Wang²,

Miao³

et al. 2023

Front. Phys.

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We present an optimization algorithm for achieving optimal acoustic stealth performance during designing an underwater vehicle shape in the free field using COMSOL-MATLAB integrated software. A component superposition method based on phase interference is adopted to simplify and decompose a nonaxisymmetric complex underwater vehicle model into two main parts: the hull and the conning tower. The shape of underwater vehicle hull is described mathematically with a sequence of undetermined coefficients for optimization. The basic mathematical principle of the proposed method is Kirchhoff approximation, also called planar element method (PEM). Additionally, some examples and experimental results show that this method can realize the automatic optimization design of acoustic stealth shapes for underwater vehicle model in a given frequency band and acoustic incident angle range. The underwater vehicle design has a smooth appearance with low target strength (TS) or angle detection rate for most detection angles and frequency bands after optimized.

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“…The derivation of this work differs from other UTD studies in that it follows the approach of Ufimstev's 3D PTD [3]. The derived heuristic PTD will supplement physical optics (PO) models [18][19][20] for an impedance object and will help clarify the validity of existing heuristic approaches. In Section 2, the heuristic PTD for an edge is formulated from the Kirchhoff-Helmholtz integral equation and compared with Luebbers' heuristic UTD.…”

Section: Introductionmentioning

confidence: 99%

Heuristic Physical Theory of Diffraction for Impedance Polygon

Lee¹,

Park²,

Kim³

et al. 2013

International Journal of Ocean System Engineering

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A heuristic physical theory of diffraction (PTD) for an acoustic impedance wedge is proposed. This method is based on Ufimtsev's three-dimensional PTD, which is derived for an acoustic soft or hard wedge. We modify the original PTD according to the process of physical optics (or the Kirchhoff approximation) to obtain a 3D heuristic diffraction model for an impedance wedge. In principle, our result is equivalent to Luebbers' model presented in electromagnetism. Moreover, our approach provides a useful insight into the theoretical basis of the existing heuristic diffraction methods. The derived heuristic PTD is applied to an arbitrary impedance polygon, and a simple PTD formula is derived as a supplement to the physical optics formula.

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A fast estimation of sonar cross section of acoustically large and complex underwater targets using a deterministic scattering center model

Cited by 6 publications

References 14 publications

Applying time domain physical optics to acoustic wave backscattering problem

Applying time domain physical optics to acoustic wave backscattering problem

Optimum design of acoustic stealth shape of underwater vehicle model with conning tower

Heuristic Physical Theory of Diffraction for Impedance Polygon

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