Studies of the validity of the Kirchhoff approximation for rough‐surface scattering
作者:
Eric I. Thorsos,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1986)
卷期:
Volume 80,
issue S1
页码: 116-116
ISSN:0001-4966
年代: 1986
DOI:10.1121/1.2023589
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The accuracy of the Kirchhoff approximation for randomly rough, pressure‐release surfaces has been examined through comparison with exact numerical results based on solving an integral equation. A Gaussian roughness spectrum was chosen for the surfaces, and a Monte Carlo procedure was used to obtain the average bistatic scattering cross section. Results will be presented that illustrate the breakdown of the Kirchhoff approximation as the incident grazing angle is reduced and as the average radius of curvature is reduced. The accuracy of shadowing corrections to the Kirchhoff approximation will also be discussed. [Work supported by ONR.]
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