Prediction of Ground-Shock-Induced Airblast Over-pressures for Subsurface Explosions from Peak Vertical Spall Velocity.
ARMY ENGINEER EXPLOSIVE EXCAVATION RESEARCH OFFICE LIVERMORE CALIF
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A technique is presented for the prediction of ground-shock-induced airblast overpressures resulting from the subsurface detonation of nuclear and chemical explosives. The technique is based on a theory and physical model, developed by D.N. Montan of the Lawrence Livermore Laboratory, which correlates ground-shock-induced airblast overpressures with the vertical velocity of the rising mound above the detonation point. The derivation of the theory is reviewed in detail and the models predictions are compared with airblast overpressure values measured during almost a score of large-yield chemical and nuclear detonations. Appendices provide supplementary information on the correlation between vertical surface velocities and induced overpressures, extend the theory to five- and seven-charge row detonations, and apply the theory to contained and mounding detonations and to detonations in a noncompetent saturated medium overlain with water. Author