Decoupling ring

Details Decoupling ring Decoupling ring

1994-06-07

1995-06-27

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367165, 367173, 367176, 367153, 114 213, 310326, H04R 1700

Patent

active

054285828

ABSTRACT:
A decoupling ring provided on the front annular face of the nose shell of a craft, surrounding the sonar array. This ring decouples the vibration in the nose shell from the fluid path. The decoupling ring is constructed of one or more mass elements on one or more compliance elements. The individual compliance elements are preferably vibrationally speaking springs and the mass elements are preferably metal segments which form a mass-spring system. The dimensions and characteristics of the mass and compliance rings are chosen to have a fundamental resonant frequency well below the sonar frequency range of interest, thus acting as a low pass filter. When the vibrational energy has a frequency above the resonant frequency of the mass spring system, the vibrational energy is attenuated effectively. The low frequency resonance of the decoupling ring is obtained by using a large mass and a large compliance in the mass and compliance elements, respectively.

REFERENCES:
patent: 3854060 (1974-12-01), Cook
patent: 4192246 (1980-03-01), Hodges et al.
patent: 4463454 (1984-07-01), Hemond et al.
patent: 4731763 (1988-03-01), Wagner
patent: 4989530 (1991-02-01), Thompson, Jr. et al.
patent: 5007030 (1991-04-01), Sullivan et al.

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