Coupled guided acoustic modes in water-filled thin-walled tubes.
Recent results [J. D. N. Cheeke et al., J. Acoust. Soc. Am. 104, 3678 (1998)] reported a 20% decrease in group velocity for flexural mode circumferential waves propagating around water-filled thin-walled stainless-steel tubes. In the present work, the full theory of such modes is developed to explain the structure modes which originates from the coupling between the water filler and stainless tube. Calculated values of the group velocity for the first two coupled modes are in excellent agreement with experiment. The results are of interest for the physics of acoustic waves in fluid-loaded structures and have potential application for liquid level detection.
Maze
G
G
LAUE UMR CNRS 6068, Université du Havre, Le Havre, France.
Cheeke
J D
JD
Li
X
X
Wang
Z
Z