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首页> 外文会议>OCEANS 2016 MTS/IEEE Monterey >Locating strong acoustic scattering on the seafloor using wedge diffraction theory
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Locating strong acoustic scattering on the seafloor using wedge diffraction theory

机译：利用楔形衍射理论在海底定位强声散射

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The challenge of rapidly and accurately assessing the potential acoustic scattering from bathymetric features requires a physics based solution to the rough surface scattering problem that captures the essential behavior of the scattering while still retaining a level of simplicity that allows for fast computation. A very common and simple geometric proxy (derived from the Kirchhoff approximation) associates the degree to which local tangent-plane surfaces are oriented to provide specular reflection in the direction of the receiver with the strength of the scattering. Such an approach is bound to fail for almost all natural rough surfaces simply because diffraction not reflection is the dominant scattering mechanism. In this paper, the capacity of rough surface scattering models based on wedge diffraction theory to accurately model the scattering from bathymetric shapes is reviewed. Easily computed geometric metrics, derived from the wedge diffraction modeling approach, that can act as proxies for the full scattering calculation are proposed and a demonstrated.
机译：快速而准确地评估来自测深特征的潜在声散射的挑战要求对粗糙表面散射问题采取基于物理学的解决方案，该问题能够捕获散射的基本行为，同时仍保持允许快速计算的简单程度。一个非常普通和简单的几何代理（从基尔霍夫近似推导而来）将局部切平面表面的定向程度与在接收器方向上的镜面反射与散射强度相关联。仅仅因为衍射而不是反射是主要的散射机制，所以这种方法注定对几乎所有自然粗糙表面都是失败的。本文综述了基于楔形衍射理论的粗糙表面散射模型对测深形状散射的精确建模能力。提出并论证了从楔形衍射建模方法派生而来的可轻松计算的几何度量，该度量可作为完全散射计算的代理。

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