海底反射参数对平均场强结构的控制
The Averaged Intensity Structure Determined by the Parameters of the Bottom-Reflection-Loss
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摘要: 海底的反射性能是影响水声传播的重要环境因素。无论从海洋声场予报角度或水声信道匹配角度都需要对海底的反射性能作切合实际的简化描述。对声场分析而言,参数化描写是常用的手段。以前曾采用最简单的“单参数”与“双参数”模型来分析声场规律[1-4]。这些模型的缺点是没有反映出反射损失的全部掠角关系的主要特征,而只注意了小掠角的局部特征,因而近场与远场难於衔接。在文[5]中,我们根据大量实测数据的一般趋势,提出了“三参数”模型进行平均声场的分析,基本上克服了这一困难。并给出由“过度距离”标定的场强结构。Abstract: In this paper,a series of "three parameters" model of boundary reflection loss has been considered.It is important,to determine in what a manner the prameters infiuence the averaged field structure.A "displacrnental structure control" effect was given for the averaged field intensity in a homogeneous layer.
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Shang,E.C.(尚尔昌),1963.On the Anti-waveguide Propa6atioa in an Inhomogeneous Layer.Scientia Sinica,12 (4):521. Macpherson,J.D.,M.d.Daintith 1967,Practical Model of Shallow-water,Acoustic Propagation.J.A.S.A.41:850. Weston,D.E.,1971,Intensity Range Relation in Oceanographic Acoustics,J.Sound.Vib.,18 (2):271. Бреховских,Л.М.,1958,Волны в Слоистых Средах,Изд Ан СССР. Shang,E.C.(尚尔昌).1976.Transition Ranges of the Average Sound Field in Shallow Water.Scientia Sinica.79 (6):794. -
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