UNDERWATER SHOCK WAVE FREQUENCY SPECTRUM ANALYSIS. 3. FREQUENCY SPECTRUM OF PRESSURE PULSES GENERATED BY ONE-POUND BLACK POWDER AND PROPELLANT CHARGES (U)
NAVAL ORDNANCE LAB WHITE OAK MD
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The frequency composition of the initial pressure pulse from underwater explosions of one-pound black powder and propellant charges encased in heavy cylindrical containers was obtained from pressure-time records providing spectrum levels of only two to four db less than for the same weight of TNT at very low frequencies. This deviation from the TNT level, however, increased rapidly with increasing frequency being greater for black powder.
- Ammunition and Explosives