Vibration isolation module

Details Vibration isolation module Vibration isolation module

1993-03-25

1995-10-31

Dang, Khanh

Acoustics

Sound-modifying means

Mechanical vibration attenuator

367 20, 367154, 1741015, F16F 1500

Patent

active

054631939

ABSTRACT:
A Vibration Isolation Module (VIM) for a towed acoustic streamer includes cylindrical masses attached at regular spacing to a central core of viscoelastic damping material, which may be extruded over a snubbed elastic strength member. Further snubbed elastic strength members may be attached around the outer diameter of the masses. Viscous "dash-pot" type dampers are installed within the masses. The space between the masses is filled with open cell plastic foam, around which is wrapped a layer of power and data cables. A jacket of damped thermoplastic is extruded over the cable layer and caps containing a fluid filling valve are attached at each end of the module, and the interior void is filled with a low density, high viscosity fluid. The "dash-pot" type dampers can be replaced by a stocking which, under extension, compresses the foam and forces fluid through pores of the foam, thus simulating the viscous damping of the "dash-pot" type dampers.

REFERENCES:
patent: 4090168 (1978-05-01), Miller et al.
patent: 5062085 (1991-10-01), Andrews, Jr.

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