不同管材侧向环形切缝装药爆炸能量传递特性

Transfer Characteristics of Explosion Energy Released by the Charge Confined to Tubes of Different Materials with Lateral Annular Slits

为了探究不同管材侧向环形切缝装药的爆炸能量传递特性,开展常规柱状装药和4种管材侧向环形切缝装药的爆炸实验,借助高速纹影拍照系统和冲击波超压监测系统捕获了爆炸波的传播历程和监测爆炸压力的分布情况,分析了侧向环形切缝装药爆炸能量传递规律,以及管材对其能量传递特性的影响。结果显示:侧向环形切缝装药爆炸之后,爆轰产物和冲击波均先朝着切缝方向向外传播,非切缝方向爆轰产物和冲击波的传播相对滞后;与常规柱状装药的爆炸压力对称分布相比,侧向环形切缝管会减小非切缝方向爆炸压力和增大切缝方向爆炸压力,爆炸压力的非对称分布证明侧向环形切缝装药在切缝方向诱发产生了聚能效应;不同管材侧向环形切缝装药的聚能效果强弱顺序为不锈钢(SS)>聚氯乙烯(PVC)>纤维强化塑料(FRP)>有机玻璃(PMMA)。

To study the transfer characteristics of explosion energy released by the charge confined to tubes of different materials with lateral annular slits,explosion experiments were conducted involving charges with or without confinement to tubes of four materials.The high speed schlieren photographic system and shock wave overpressure monitoring system were employed to cap⁃ture the propagation process of shock wave and obtain the distribution law of overpressure respectively,so that the explosion en⁃ergy transfer law for the charges confined to tubes with lateral annular slits and the influence of tube material on its energy trans⁃fer characteristics were analyzed.The results showed that after the explosion of the charge confined to tubes with lateral annular slit,both the detonation product and shock waves firstly propagated outward towards the direction with slit,but the propagation towards the opposite direction is relatively delayed.Compared with the symmetric distribution of overpressure generated by a conventional cylindrical charge,the lateral annular slits in tubes could increase the overpressure in the direction with slit,but de⁃crease that in the opposite direction.The asymmetric distribution of overpressure proved that the charge confined to tubes with lateral annular slits induced Munroe Effect in the slit direction.The hierarchy of Munroe Effect caused by lateral annular slits pre⁃sented by materials:stainless steel(SS)>polyvinyl chloride(PVC)>fiber reinforced plastic(FRP)>plexiglass(PMMA).