LOW- TO MID-FREQUENCY SCATTERING FROM ELASTIC OBJECTS ON A SAND SEA FLOOR: SIMULATION OF FREQUENCY AND ASPECT DEPENDENT STRUCTURAL ECHOES
LOW- TO MID-FREQUENCY SCATTERING FROM ELASTIC OBJECTS ON A SAND SEA FLOOR: SIMULATION OF FREQUENCY AND ASPECT DEPENDENT STRUCTURAL ECHOES
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DOI：
10.1142/s0218396x12400073
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发表时间：
2012-06
影响因子：
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通讯作者：
M. Zampolli;A. España;K. Williams;S. Kargl;E. Thorsos;J. Lopes;J. Kennedy;P. Marston
中科院分区：
文献类型：
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作者：
M. Zampolli;A. España;K. Williams;S. Kargl;E. Thorsos;J. Lopes;J. Kennedy;P. Marston
通过数值模拟研究了 130 kHz 频段内大约米大小的目标（例如管道、圆柱体和未爆炸弹药壳）的散射，并与实验结果进行了比较。用于计算频率和方向相关的目标强度的数值工具是一个混合模型，由目标附近的局部有限元模型和基于层状介质格林函数波数谱积分表示的传播模型组成，该模型基于将轴对称物体的三维散射问题分解为一系列独立的二维问题。 © 2012 IMACS。
The scattering from roughly meter-sized targets, such as pipes, cylinders and unexploded ordnance shells in the 130 kHz frequency band is studied by numerical simulations and compared to experimental results. The numerical tool used to compute the frequency and aspect-dependent target strength is a hybrid model, consisting of a local finite-element model for the vicinity of the target, based on the decomposition of the three-dimensional scattering problem for axially symmetric objects into a series of independent two-dimensional problems, and a propagation model based on the wavenumber spectral integral representation of the Green's functions for layered media. © 2012 IMACS.