Downslope propagation of normal modes in a shallow water wedge
作者:
C. T. Tindle,
H. Hobaek,
T. G. Muir,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1987)
卷期:
Volume 81,
issue 2
页码: 275-286
ISSN:0001-4966
年代: 1987
DOI:10.1121/1.394947
出版商: Acoustical Society of America
关键词: SOUND WAVES;WAVE PROPAGATION;WATER;NORMAL−MODE ANALYSIS
数据来源: AIP
摘要:
Experimental results are presented for the downslope propagation of acoustic normal modes in a shallow water wedge with a penetrable bottom and a slope of up to 9°. A 7‐element line source was used to generate individual low‐order normal modes. To obtain single modes in a wedge it was necessary to align the line source to form an arc of a circle centered on the wedge apex. The resulting normal modes propagate with wave fronts which are also curved into arcs of circles centered on the wedge apex. These ‘‘wedge modes’’ propagate without coupling. The amplitudes, mode functions, and group velocities of the wedge modes are described by simple adiabatic normal mode theory, but the wave front curvature is not.
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