Acoustic/shock wave attenuating assembly

  • US 5,225,622 A
  • Filed: 02/12/1992
  • Issued: 07/06/1993
  • Est. Priority Date: 06/19/1990
  • Status: Expired due to Term
First Claim
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1. An assembly for attenuating pressure conditions including shock waves and comprisinga flowable attenuating medium exhibiting aqueous foam characteristics, namely the ability of acting in the nature of a liquid mass to resist relative displacement by surface tension and viscous forces and the ability to substantially scatter and disperse pressure conditions transmitting therethrough by virtue of multitudinous curved surfaces between phases, and enabling the generation of turbulent flow fields by transmitting pressure conditions,the flowable attenuating medium comprising solid particulates having bulk mechanical properties and flow properties of a fluid, namely the ability of acting in the nature of a liquid mass to resist relative displacement by surface tension and viscous forces and the ability to substantially scatter and disperse pressure conditions transmitting therethrough by virtue of multitudinous curved surfaces dividing gaseous and solid or liquid and solid phases, and enabling the generation of turbulent flow fields by transmitting pressure conditions,confinement means for containing and supporting the flowable attenuating medium, the combination of the confinement means and flowable attenuating medium being arranged for intercepting the pressure conditions to be attenuated, the confinement means being porous with respect to the pressure conditions for allowing the pressure conditions to penetrate the flowable attenuating medium, the porous confinement means also causing substantial pressure decrease of pressure conditions penetrating the porous confinement means, andmeans associated with the solid particulates for enhancing their resistance to relative displacement and thereby causing the solid particulates to better simulate characteristics of an aqueous foam.

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