The influence of evenly spaced ribs (internal rings) on the acoustic scattering from a finite cylindrical shell is examined over the dimensionless frequency range (where is the wave number in water and the outer radius of the cylinder). Experimental results, obtained with a monostatic setup, are discussed in the incidence angle/time and incidence angle/frequency domains. The physical phenomena that give rise to highlights in the experimental spectra (Bragg scattering and scattering from Bloch-Floquet waves) are investigated. Fast Fourier Transform (FFT) processing on different segments of time signals allows us to distinguish influences of these phenomena. Further, comparison is made between frequency based results and numerical results provided by, respectively, a theoretical model using the thin shell theory [Tran-Van-Nhieu, J. Acoust. Soc. Am. 110, 2858–2866 (2001)] and a simple scattering/interference calculation.
REFERENCES
1.
D. D.
Doolittle
and H.
Überall
, “Sound scattering by elastic cylinders
,” J. Acoust. Soc. Am.
39
, 272
–275
(1966
).2.
A.
Derem
, J. L.
Rousselot
, G.
Maze
, J.
Ripoche
, and A.
Faure
, “Diffusion d’une onde plane par des cylindres solides immergés: Étude expérimentale et théorie des résonances
,” (Scattering of a plane wave by immersed solid cylinders: experimental study and resonances theory), Acustica
50
, 39
–50
(1982
).3.
G.
Maze
, “Diffusion d’une onde acoustique plane par des cylindres et des tubes immergés dans l’eau. Isolement et identification des résonances
,” (Scattering of an acoustic plane wave by cylinders and tubes immersed in water. Isolation and identification of resonances), Ph. D. dissertation, Rouen, 1984
.4.
F.
Léon
, F.
Lecroq
, D.
Décultot
, and G.
Maze
, “Scattering of an obliquely incident acoustic wave by an infinite hollow cylindrical shell
,” J. Acoust. Soc. Am.
91
, 1388
–1397
(1992
).5.
S. F.
Morse
and P. L.
Marston
, “Meridional ray contributions to scattering by tilted cylindrical shells above the coincidence frequency: Ray theory and computations
,” J. Acoust. Soc. Am.
106
, 2595
–2600
(1999
).6.
S. F.
Morse
, “High-frequency acoustic backscattering enhancements for finite cylindrical shells in water at oblique incidence
,” Ph. D. dissertation, Washington State University, Department of Physics
, 1998
;S. F.
Morse
, P. L.
Marston
, and G.
Kaduchak
, “High-frequency backscattering enhancements by thick finite cylindrical shells in water at oblique incidence: Experiments, interpretation and calculations
,” J. Acoust. Soc. Am.
103
, 785
–794
(1998
).7.
L.
Haumesser
, D.
Décultot
, F.
Léon
, and G.
Maze
, “Experimental identification of finite cylindrical shell vibration modes
,” J. Acoust. Soc. Am.
111
, 2034
–2039
(2002
).8.
X. L.
Bao
, “Echoes and helical surface waves on finite elastic cylinder excited by sound pulses in water
,” J. Acoust. Soc. Am.
94
, 1461
–1466
(1993
).9.
D.
Décultot
, F.
Lecroq
, G.
Maze
, and J.
Ripoche
, “Acoustic scattering from a cylindrical shell bounded by hemispherical endcaps. Resonance interpretation with surface waves propagating in cylindrical and spherical shells
,” J. Acoust. Soc. Am.
94
, 2916
–2923
(1993
).10.
S. F.
Morse
and P. L.
Marston
, “Backscattering of transients by tilted truncated cylindrical shells: Time-frequency identification of ray contributions from measurements
,” J. Acoust. Soc. Am.
111
, 1289
–1294
(2002
).11.
A.
Klauson
, J.
Metsaveer
, D.
Décultot
, G.
Maze
, and J.
Ripoche
, “Identification of the resonances of a cylindrical shell stiffened by an internal lengthwise rib
,” J. Acoust. Soc. Am.
100
, 3135
–3143
(1996
).12.
J.
Chiumia
, N.
Touraine
, D.
Décultot
, G.
Maze
, A.
Klauson
, and J.
Metsaveer
, “Experimental analysis of acoustic scattering from lengthwise soldered cylindrical shells
,” J. Acoust. Soc. Am.
105
, 183
–193
(1999
).13.
A.
Baillard
, J-M.
Conoir
, D.
Décultot
, G.
Maze
, A.
Klauson
, and J.
Metsaveer
, “Acoustic scattering from fluid-loaded stiffened cylindrical shell: Analysis using elasticity theory
,” J. Acoust. Soc. Am.
107
, 3208
–3216
(2000
).14.
D. M.
Photiadis
, J. A.
Bucaro
, and B. H.
Houston
, “Scattering from flexural waves on a ribbed cylindrical shell
,” J. Acoust. Soc. Am.
96
, 2785
–2790
(1994
).15.
B. H.
Houston
, J. A.
Bucaro
, and D. M.
Photiadis
, “Broadband acoustic scattering from a ribbed shell
,” J. Acoust. Soc. Am.
98
, 2851
–2853
(1995
).16.
D. M.
Photiadis
, B. H.
Houston
, E. G.
Williams
, and J. A.
Bucaro
, “Resonant response of complex shell structures
,” J. Acoust. Soc. Am.
108
, 1027
–1035
(2000
).17.
M.
Tran-Van-Nhieu
, “Scattering from a ribbed finite cylindrical shell
,” J. Acoust. Soc. Am.
110
, 2858
–2866
(2001
).18.
N.
Touraine
, L.
Haumesser
, D.
Décultot
, G.
Maze
, A.
Klauson
, and J.
Metsaveer
, “Analysis of the acoustic scattering at variable incidences from an extra thin cylindrical shell bounded by hemispherical endcaps
,” J. Acoust. Soc. Am.
108
, 2187
–2196
(2000
).19.
P. H.
Rogers
and A. L.
Van Buren
, “New approach to a constant beamwidth transducer
,” J. Acoust. Soc. Am.
64
, 38
–43
(1978
).20.
L.
Haumesser
, A.
Baillard
, D.
Décultot
, and G.
Maze
, “Behavior of first guided wave on finite cylindrical shells of various lengths: Experimental investigation
,” J. Acoust. Soc. Am.
109
, 583
–590
(2001
).21.
© 2005 Acoustical Society of America.
2005
Acoustical Society of America
You do not currently have access to this content.
