SHOCK WAVE PRESSURES OVER CORAL SAND AND MUD FROM THE NOTS 301D LINE CHARGE
NAVAL ORDNANCE LAB WHITE OAK MD
Pagination or Media Count:
Underwater pressure measurements obtained on four bottom shots of the NOTS 301D demolition line charge 700 ft long, 4200-lb of Comp. C-4 are presented. The pressure field on the bottom around the line charges appeared to be nearly rectangular in shape i.e., high pressures off the side of the charge and very low pressures off the ends. The pressures were highest for charges fired over a coral sand bottom in 55 ft of water pressures from charges fired over a coral sand bottom in 12 ft of water were approximately equal to those over a mud bottom in 60 ft of water. The pressures from the latter two conditions were about 40 to 60 per cent lower than those obtained for the first condition. There was considerable scatter among the results this was probably due mainly to variations in the properties of the bottom along the length of each charge.