Scattering from a random surface
作者:
Henry D. I. Abarbanel,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1980)
卷期:
Volume 68,
issue 5
页码: 1459-1466
ISSN:0001-4966
年代: 1980
DOI:10.1121/1.385113
出版商: Acoustical Society of America
关键词: FLUCTUATIONS;WAVE EQUATIONS;SURFACES;RANDOMNESS;SCALARS;WAVE PROPAGATION;TIME DEPENDENCE;SOUND WAVES;SEAS;BOUNDARY CONDITIONS
数据来源: AIP
摘要:
We give a formulation of the problem of propagation of scalar waves over a random surface. By a judicious choice of variables we are able to show that this situation is equivalent to propagation of these waves through a medium of random fluctuations with fluctuating source and receiver. The wave equation in the new coordinates has an additional term, the fluctuation operator, which depends on derivatives of the surface in space and time. An expansion in the fluctuation operator is given which guarantees the desired boundary conditions at every order. We treat both the cases where the surface is time dependent, such as the sea or surface, or fixed in time. Also discussed is the situation where the source and receiver lie between the random surface and another, possibly also random, surface. In detail we consider acoustic waves for which the surfaces are pressure release. The method is directly applicable to electromagnetic waves and other boundary conditions.
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