Acoustic scattering from a cylindrical shell bounded by hemispherical endcaps. Resonance interpretation with surface waves propagating in cylindrical and spherical shells

1993 ◽  
Vol 94 (5) ◽  
pp. 2916-2923 ◽  
Author(s):  
D. Décultot ◽  
F. Lecroq ◽  
G. Maze ◽  
J. Ripoche
Keyword(s):  
Cylindrical Shell ◽  
Surface Waves ◽  
Acoustic Scattering ◽  
Spherical Shells

scholarly journals Isolation of the resonant component in acoustic scattering from fluid‐loaded elastic spherical shells

1978 ◽  
Vol 64 (S1) ◽  
pp. S129-S129
Author(s):  
J. Diarmuid Murphy ◽  
Jacob George ◽  
Anton Nagl ◽  
Herbert Überall
Keyword(s):  
Acoustic Scattering ◽  
Spherical Shells

Propagation of surface waves on the surface of a non-homogeneous aeolotropic cylindrical shell

1973 ◽  
Vol 110 (1) ◽  
pp. 1939-1945 ◽  
Author(s):  
B. G. Verma ◽  
Vinod Kumar Srivastava
Keyword(s):  
Cylindrical Shell ◽  
Surface Waves

Acoustically excited surface waves on empty or fluid-filled cylindrical and spherical shells

2002 ◽  
Vol 111 (5) ◽  
pp. 2398
Author(s):  
A. Claude Ahyi ◽  
H. Cao ◽  
P. K. Raju ◽  
M. F. Werby ◽  
X. L. Bao ◽  
...  
Keyword(s):  
Surface Waves ◽  
Spherical Shells

scholarly journals Simulation and analysis on low-frequency scattering characteristics of the finite cylindrical shell in shallow water

2019 ◽  
Vol 283 ◽  
pp. 03007
Author(s):  
Jinyu Li ◽  
Dejiang Shang ◽  
Yan Xiao
Keyword(s):  
Cylindrical Shell ◽  
Free Space ◽  
Acoustic Scattering ◽  
Low Frequency ◽  
Target Strength ◽  
Wave Direction ◽  
Scattering Field ◽  
Simulation Results ◽  
Finite Cylindrical Shell ◽  
Target Locations

Low-frequency acoustic scatterings from a finite cylindrical shell are numerically analyzed by FEM. The simulation results show that the acoustic-scattering field in waveguide has lots of frequency-related sidelobes, while no sidelobes exist in free space at low frequencies. The simulation also indicates that the module value in waveguide can be almost 20 dB larger than that in free space at low frequency, which is caused by the ocean boundaries. We also demonstrate that when the incident wave direction is normal to the target at low frequency, the target strength will be maximum and the distribution of the acoustic-scattering field is axisymmetric about the incident waving direction. Meanwhile, the acoustic-scattering field is also related to the impedance of the seabed, and the change of the impedance makes just a little contribution to the scattering field. Finally, the influence of different target locations is analyzed, including the targets near the sea surface, seabed and the middle region of the ocean waveguide, respectively. From simulation results, it is evident that the distribution of the acoustic-scattering field at low frequency has a little difference, which is smaller than 0.5 dB with various target locations, and the change is frequency and boundary-related.

Analysis of the acoustic scattering at variable incidences from an extra thin cylindrical shell bounded by hemispherical endcaps

2000 ◽  
Vol 108 (5) ◽  
pp. 2187-2196 ◽  
Author(s):  
N. Touraine ◽  
L. Haumesser ◽  
D. Décultot ◽  
G. Maze ◽  
A. Klauson ◽  
...  
Keyword(s):  
Cylindrical Shell ◽  
Acoustic Scattering ◽  
Thin Cylindrical Shell
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