Accession Number : AD0742825
Title : Spectral Level of Explosive Charges Fired Very Near the Surface.
Descriptive Note : Technical rept.,
Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MASS
Personal Author(s) : McElroy,Paul T.
Report Date : MAY 1972
Pagination or Media Count : 29
Abstract : The spectral levels of 85 one-half pound blocks of TNT fired at the shallow depth of 18 inch have been determined in 26 contiguoug one-third octave bands extending from 112 Hz to 35.4 kHz. Measurements were made in sea states varying from 0 to 5. Mean levels, standard deviations and standard deviations of the mean are given. The spectra deviate markedly from the expected spectra of a shock pulse alone. A theoretical model incorporating a direct signal and a surface reflection truncated by cavitation, gives a reasonable fit to the experimental curves particularly after cavitation pressure is adjusted as a parameter to improve the match. (Author)
Descriptors : (*UNDERWATER EXPLOSIONS, POWER SPECTRA), EXPLOSIONS, SHALLOW WATER, SOUND, OCEAN WAVES, SHOCK WAVES, CAVITATION, EXPERIMENTAL DATA
Subject Categories : Explosions
Distribution Statement : APPROVED FOR PUBLIC RELEASE