Relation of Air Explosion Shock Wave Overpressure and Detonation Parameters of Explosives

To research the relation of air explosion shock wave overpressure and detonation parameters of explosives,the RDX-based and HMX-based composite explosives with different aluminum content were designed and the air explosion experiment was performed.Based on the explosion similarity law,the TNT equivalence of shock wave overpressure was calculated using TNT explosion overpressure data measured in the same condition.The detonation parameters of explosives were calculated by different methods.The results show that there is a linear relationship between TNT equivalence of air explosion shock wave overpressure and one-third power of the TNT equivalence for the product of the detonation heat,detonation volume and detonation velocity,and the intercept of regression at y-axis is zero.The slope relates to the types of explosive.The slope is 1 for TNT,1.053(R2=0.9996)for RDX/Al composite explosives and 1.073(R2=0.9995)for HMX/Al composite explosives,indicating that the detonation heat,detonation volume and detonation velocity have the same influence on air explosion shock wave overpressure.