破片撞击起爆柱面带壳装药的临界速度修正判据

In this work, to obtain the critical detonation velocity calculation model about the cylindrical covered charge impacted by fragments, we added the correction terms to the velocity calculation based on the Picatinny engineering criterion. We found out about the influence of the fragment impact angle and the charge curvature radius on the critical detonation velocity using the AUTODYN software through simulating the tungsten fragment impact cylindrical steel casing filled with B explosive. Based on the fitting expression, we established the critical velocity calculation model of the explosive initiation considering the impact angle and the charge shape function. The model calculation values are in good agreement with the experimental data and the simulation results, thereby suggesting that the model can provide a better prediction of the impact initiation of the cylindrical covered charge.