Optimizing the compressional wave energy response of an elastic

Details Optimizing the compressional wave energy response of an elastic Optimizing the compressional wave energy response of an elastic

1997-05-29

1998-07-14

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367901, H04R 144

Patent

active

057815089

ABSTRACT:
A method and system are provided to optimize filtering of compressional wave energy in the wavenumber domain for a given frequency range using a fluid-filled elastic cylinder. The fluid is selected based on its fluid density .rho..sub.i and dilatational wave phase velocity c.sub.i. The selected fluid must satisfy the relationship ##EQU1## for the given frequency range where P.sub.i is the magnitude of the pressure field in the fluid at a point within the fluid defined by a distance r.sub.1 from the cylinder's central longitudinal axis and P.sub.o is the magnitude of the impinging compressional wave, and must control at least one of the breathing wave response, the extensional wave response and the fluid P-wave response.

REFERENCES:
patent: 5532979 (1996-07-01), Hansen et al.
Peloquin, Mark S.; A Closed-Form Dynamic Elasticity Solution to the Fluidructure Interaction Problem of a Two-Layer Infinite.
Viscoelastic Cylinder With Inner and Outer Fluid Loading Subject to Forced Harmonic Excitation, NUWC-NPT Technical Report 11,067 29 Dec. 1995.

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