Underwater acoustic scattering of a Bessel beam by rigid objects with arbitrary shapes using the T-matrix method

Li, Wei; Jun, Li

doi:10.1109/oceans.2012.6404861

2012 Oceans 2012

DOI: 10.1109/oceans.2012.6404861

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Underwater acoustic scattering of a Bessel beam by rigid objects with arbitrary shapes using the T-matrix method

Wei Li

Li Jun

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Cited by 2 publications

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Axisymmetric scattering of an acoustical bessel beam by a rigid fixed spheroid

Mitri

2015

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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-Based on the partial-wave series expansion (PWSE) method in spherical coordinates, a formal analytical solution for the acoustic scattering of a zeroth-order Bessel acoustic beam centered on a rigid fixed (oblate or prolate) spheroid is provided. The unknown scattering coefficients of the spheroid are determined by solving a system of linear equations derived for the Neumann boundary condition. Numerical results for the modulus of the backscattered pressure ( = ) in the near-field and the backscattering form function in the far-field for both prolate and oblate spheroids are presented and discussed, with particular emphasis on the aspect ratio (i.e., the ratio of the major axis over the minor axis of the spheroid), the half-cone angle of the Bessel beam , and the dimensionless frequency. The plots display periodic oscillations (versus the dimensionless frequency) due to the interference of specularly reflected waves in the backscattering direction with circumferential Franz' waves circumnavigating the surface of the spheroid in the surrounding fluid. Moreover, the 3D directivity patterns illustrate the nearand far-field axisymmetric scattering. Investigations in underwater acoustics, particle levitation, scattering, and the detection of submerged elongated objects and other related applications utilizing Bessel waves would benefit from the results of the present study.

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Axisymmetric scattering of an acoustical bessel beam by a rigid fixed spheroid

Mitri

2015

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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GPU-Accelerated Target Strength Prediction Based on Multiresolution Shooting and Bouncing Ray Method

Zhao

Sun²,

Shen³

et al. 2022

Applied Sciences

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The application of the traditional planar acoustics method is limited due to the low accuracy when computing the echo characteristics of underwater targets. Based on the concept of the shooting and bouncing ray which considers multiple reflections on the basic of the geometrics optics principle, this paper presents a more efficient GPU-accelerated multiresolution grid algorithm in the shooting and bouncing ray method (SBR) to quickly predict the target strength value of complex underwater targets. The procedure of the virtual aperture plane generation, ray tracing, scattered sound field integral and subdividing the divergent ray tubes are all implemented on the GPU. Particularly, stackless KD-tree traversal is adopted to effectively improve the ray-tracing efficiency. Experiments on the rigid sphere, cylinder and corner reflector model verify the accuracy of GPU-based multiresolution SBR. Besides, the GPU-based SBR is more than 750 times faster than the CPU version because of its tremendous computing capability. Further, the proposed accelerated GPU-based multiresolution SBR improves runtime performance at least 2.4 times that of the single resolution GPU-based SBR.

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Underwater acoustic scattering of a Bessel beam by rigid objects with arbitrary shapes using the T-matrix method

Cited by 2 publications

References 15 publications

Axisymmetric scattering of an acoustical bessel beam by a rigid fixed spheroid

Axisymmetric scattering of an acoustical bessel beam by a rigid fixed spheroid

GPU-Accelerated Target Strength Prediction Based on Multiresolution Shooting and Bouncing Ray Method

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