Blast Environment from Fully and Partially Vented Explosions in Cubicles
Final rept. Jun 1971-Jun 1974
CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CA
Pagination or Media Count:
Charges of cast cylinders of composition B explosive were detonated inside several small-scale 3- and 4-wall cubicles of different shape and size to establish methods and criteria for predicting the blast environment positive and negative pressures, durations, and impluses in and around cubicles containing fully and partially vented explosions. The blast environment was measured 1 inside the cubicle and 2 outside the cubicle behind the front wall, sidewalls, and rear wall at scaled distances. The blast environment was found to depend on the charge-to-volume ratio, scaled degree of venting, scaled vent area, and scaled distance. Design charts are presented for calculating the pressure-time loading in and around a cubicle for a wide range of these parameters. The procedures offer, for the first time, a rational procedure for tailoring the cubicle configuration and dimensions to the site requirements since it relates blast environment to cubicle parameters and charge weight. Some of the 3-wall cubicles had roofs and some did not. Adding a roof did not substantially reduce the blast environment at large-scaled distances. The greatest benefit from the roof was in the area close to the cubicle where the roof dramatically reduced the blast environment behind the backwall. Criteria is proposed for design loading in and around fully and partially vented cubicles.
- Ammunition and Explosives