Accession Number : AD0149358


Title :   A SIMPLE MECHANICAL METHOD FOR MEASURING THE REFLECTED IMPULSE OF AIR BLAST WAVES


Descriptive Note : Memorandum rept.


Corporate Author : ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD


Personal Author(s) : Johnson, O T ; Patterson II, J D ; Olson, W C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/149358.pdf


Report Date : Jul 1957


Pagination or Media Count : 47


Abstract : A mechanical method is described for measuring the impulse imparted to a flat rigid surface by the reflection (at 90 deg. or normal incidence) of an air blast wave. The method consists of measuring the velocity at which a cylindrical plug of known mass is projected from a hole in a large rigid surface by a normally incident blast wave and computing the impulse from Newton's 2nd law. Experimental results were obtained for spherical Pentolite explosive charges ranging in weight from 1/4 to 2 lbs and scaled distances from 0.5 to 2.5 ft/(cu.rt. lb.). Results of 154 trials are tabulated and also presented graphically. In addition, a comparison is made with data obtained with piezoelectric gages.


Descriptors :   *AIRBURST , *EXPLOSIVES , *SHOCK WAVES , BLAST LOADS , MEASUREMENT , PIEZOELECTRIC GAGES , REFLECTION


Subject Categories : Explosions


Distribution Statement : APPROVED FOR PUBLIC RELEASE