SIMULATION OF AIR-BLAST-INDUCED GROUND MOTIONS (PHASE 2)
Rept. for 1 Jul 1964-1 Feb 1965
AIR FORCE WEAPONS LAB KIRTLAND AFB NM
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Results from the Phase 2, Long-Duration High Explosive Simulation Technique LDHEST experiment are presented. This experiment simulates the airblast-induced ground motions from a large-yield nuclear weapon over a plan area 96 feet by 150 feet. A specially designed matrix of primacord was utilized to produce the desired explosion in a confined volume of air. An overburden, or mass of material, was placed over the explosion to provide a reaction force to shape the resulting wave pulse and to provide the required long durations. The experiment produced an air pressure pulse which had a peak overpressure of 312 psi, a time to one-half peak pressure of 18.2 msec, and a total duration of 170 msec. The shock front traveled at an average velocity of 5,120 ftsec. On the basis of these results, recommendations are made for future simulation experiments. The measured earth free-field motions and stresses are compared with theoretical calculations, and the validity of the technique for simulating the desired nuclear environment is established.
- Nuclear Explosions and Devices (Non-Military)