Scattering of an Obliquely Incident Plane Acoustic Wave by a Circular-Cylindrical Shell of Infinite Extent

1993 ◽  
pp. 1-15 ◽  
Author(s):  
Naum D. Veksler ◽  
Herbert Überall
Keyword(s):  
Cylindrical Shell ◽  
Acoustic Wave ◽  
Circular Cylindrical Shell ◽  
Plane Acoustic Wave ◽  
Obliquely Incident ◽  
Incident Plane ◽  
Infinite Extent

scholarly journals The scattering of an obliquely incident plane acoustic wave from a cylindrical object

1979 ◽  
Vol 66 (S1) ◽  
pp. S81-S81
Author(s):  
Lawrence Flax ◽  
Vasundara V. Varadan ◽  
Vijay K. Varadan
Keyword(s):  
Acoustic Wave ◽  
Cylindrical Object ◽  
Plane Acoustic Wave ◽  
Obliquely Incident ◽  
Incident Plane

Nonlinear Response of an Elastic Cylindrical Shell to a Transient Acoustic Wave

1981 ◽  
Vol 48 (1) ◽  
pp. 15-24 ◽  
Author(s):  
T. L. Geers ◽  
C.-L. Yen
Keyword(s):  
Cylindrical Shell ◽  
Acoustic Wave ◽  
Nonlinear Response ◽  
Circular Cylindrical Shell ◽  
Elastic Cylindrical Shell ◽  
Fluid Medium ◽  
Energy Functionals ◽  
Potential Formulation ◽  
Rigorous Treatment ◽  
Residual Potential

Governing equations are developed for the nonlinear response of an infinite, elastic, circular cylindrical shell submerged in an infinite fluid medium and excited by a transverse, transient acoustic wave. These equations derive from circumferential Fourier-series decomposition of the field quantities appearing in appropriate energy functionals, and from application of the “residual potential formulation” for rigorous treatment of the fluid-structure interaction. Extensive numerical results are presented that provide understanding of the phenomenology involved.

A0 Wave in a Submerged Stiffened Cylindrical Shell

1999 ◽  
Author(s):  
André Baillard ◽  
Jean-Marc Conoir ◽  
Dominique Décultot ◽  
Gérard Maze ◽  
Aleksander Klauson ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Cylindrical Shell ◽  
Acoustic Wave ◽  
Lamb Wave ◽  
Wave Number ◽  
Stoneley Wave ◽  
Frequency Range ◽  
Wave Type ◽  
Stiffened Cylindrical Shell ◽  
Incident Plane

Abstract The backscattering of a normal incident plane acoustic wave by a stiffened cylindrical shell is considered. The studied cylindrical shell is made of stainless steel and its internal to external radius ratio is b/a = 0.98. The shell submerged in water is strengthened by an internal plate of the same material and thickness, which is diametrically soldered. As for the unstiffened shell, A wave (Scholte-Stoneley wave) and S0 wave (first symmetrical Lamb wave) are detected in the frequency range investigated (50–200 ka where k is the wave number in water). On the contrary, the presence of the plate into the tube allows the detection of A0 wave (flexural Lamb wave) whereas it is not observed for the unstiffened shell, owing to the attenuation of the wave during the propagation around the tube. In particularl, A0 wave could be reflected on the junction with enough energy to re-emit in water. Furthermore, wave type conversions are allowed by way of the junctions: S0–A0 wave conversions are observed.

Excitation of an Elastic Cylindrical Shell by a Transient Acoustic Wave

1969 ◽  
Vol 36 (3) ◽  
pp. 459-469 ◽  
Author(s):  
T. L. Geers
Keyword(s):  
Cylindrical Shell ◽  
Acoustic Wave ◽  
Circular Cylindrical Shell ◽  
Elastic Cylindrical Shell ◽  
Sandwich Shell ◽  
Governing Equations ◽  
Fluid Medium ◽  
Method Of Solution ◽  
Plane Step ◽  
Strain Responses

An infinite, elastic, circular cylindrical shell submerged in an infinite fluid medium is engulfed by a transverse, transient acoustic wave. The governing equations for modal shell response are reduced through the application of a new method of solution to two simultaneous equations in time; these equations are particularly amenable to solution by machine computation. Numerical results are presented for the first six modes of a uniform sandwich shell submerged in water and excited by a plane step-wave. These results are then used to evaluate the accuracy of a number of approximations which have been employed previously to treat this and similar problems. The results are also used to compute displacement, velocity, and flexural strain responses at certain points in the sandwich shell.

Scattering of an obliquely incident acoustic wave by an infinite hollow cylindrical shell

1992 ◽  
Vol 91 (3) ◽  
pp. 1388-1397 ◽  
Author(s):  
Fernand Léon ◽  
Florence Lecroq ◽  
Dominique Décultot ◽  
Gérard Maze
Keyword(s):  
Cylindrical Shell ◽  
Acoustic Wave ◽  
Obliquely Incident
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