Accession Number : AD0474938


Title :   IMPLOSIVE DEVICES FOR LONG-RANGE UNDERWATER SIGNALLING


Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF METEOROLOGY AND PHYSICAL OCEANOGRAPHY


Personal Author(s) : Tinkelenberg, Hendrikus W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/474938.pdf


Report Date : Oct 1965


Pagination or Media Count : 121


Abstract : This report deals with the work done to determine the feasibility of long-distance underwater signalling by means of implosions caused by pressure- activated rupture discs. The design and use of a laboratory instrument to study the behavior of rupture discs under pressure is described. The experiments performed with this instrument and their results are reported. A field experiment was conducted to determine the amount of energy obtained from implosion devices as well as the distance over which they can be heard. In the course of the experiments in the laboratory and in the field it was found that the pressure at which rupture occurs is determined by the depth of two mutually perpendicular grooves cut into one face of each disc, and that at a depth of 2500 feet (1100 psi) an implosive volume of 3 cubic feet is equivalent in potential energy to 1 lb. of TNT. It is also shown that the use of neutrally- buoyant floats equipped with implosive devices to study deep currents in the ocean is perfectly feasible.


Descriptors :   *UNDERWATER EXPLOSIONS , *UNDERWATER SOUND SIGNALS , *UNDERWATER COMMUNICATIONS , EXPERIMENTAL DATA , OCEAN CURRENTS , DEFLECTION , EXPLOSIONS , RUPTURE , PIPES , FLOATS , FEASIBILITY STUDIES , PRESSURE VESSELS , DISKS , RANGE(DISTANCE) , HYDROSTATIC PRESSURE


Subject Categories : Non-radio Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE