Acoustic wave diffraction by an elastic cylindrical shell with viscous filling

1989 ◽  
Vol 25 (7) ◽  
pp. 662-667 ◽  
Author(s):  
O. B. Kachaenko ◽  
L. S. Pal'ko ◽  
N. A. Shul'ga
Keyword(s):  
Cylindrical Shell ◽  
Acoustic Wave ◽  
Wave Diffraction ◽  
Elastic Cylindrical Shell

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.

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.

Vibrations of a heavily fluid-loaded, semi-infinite, cylindrical elastic shell. II

1987 ◽  
Vol 414 (1847) ◽  
pp. 371-387 ◽  
Keyword(s):  
Exact Solution ◽  
Cylindrical Shell ◽  
Acoustic Wave ◽  
Elastic Shell ◽  
Sound Field ◽  
Elastic Cylindrical Shell ◽  
Fluid Loading ◽  
Heavy Fluid ◽  
Short Waves ◽  
Inviscid Compressible Fluid

A semi-infinite elastic cylindrical shell is rigidly bonded to a semi-infinite cylindrical rigid duct; the whole being totally immersed in an inviscid, compressible fluid. The system is forced by means of a plane acoustic wave incident along the duct. An exact solution for the resulting sound field is obtained by using the Wiener-Hopf technique. The asymptotic limit of heavy fluid loading and short waves is used to interpret this.

The spectral functions method for acoustic wave diffraction by a stress-free wedge: Theory and validation

2019 ◽  
Vol 377 ◽  
pp. 200-218 ◽  
Author(s):  
Samar Chehade ◽  
Audrey Kamta Djakou ◽  
Michel Darmon ◽  
Gilles Lebeau
Keyword(s):  
Acoustic Wave ◽  
Wave Diffraction ◽  
Spectral Functions
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