Relationship between plate and surface modes of a tube
作者:
R. L. Rosenberg,
R. N. Thurston,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1977)
卷期:
Volume 61,
issue 6
页码: 1499-1502
ISSN:0001-4966
年代: 1977
DOI:10.1121/1.381450
出版商: Acoustical Society of America
数据来源: AIP
摘要:
A circular tube will support axially sysmetric surface acoustic waves at both surfaces, and also a pair of axially symmetric platelike modes. The two pairs of modes are analogous to similar mode pairs on a flat plate. The relationships between surface and plate modes are well known for the flat‐plate geometry. It is shown here that for the tube geometry, the mode relationships are of a different kind. Whereas the high‐frequency surface modes on a flat plate are superpositions of the two lowest Lamb modes, the high‐frequency surface modes on a tube are in general not superpositions at all. On a tube, each surface mode is the high‐frequency representative of a single platelike tube mode.
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