基于爆轰波碰撞形成LEFP的研究

LINEAR EXPLOSIVELY-FORMED PENETRATORS BASED ON DETONATION WAVE COLLISION

采用圆缺型药型罩线性装药结构,设定线性装药两端面中心同时起爆,该文对两端同时起爆条件下基于爆轰波碰撞形成的LEFP(Linear Explosively Formed Penetrators)进行了研究。首先开展爆轰波碰撞的理论压力计算,探究了形成LEFP的压力条件,然后利用LS-DYNA软件对LEFP进行数值模拟,同时结合脉冲X光捕捉LEFP的成型实验和在不同炸高下LEFP的侵彻实验,详细阐明了LEFP的成型机理。理论分析、数值模拟和实验结果三者表明:基于爆轰波碰撞条件下圆缺型药型罩线性装药结构可形成具有较大长径比的LEFP。

Using near-half-cylindrical Linear Shaped Charges(LSCs) and detonating it at the center of two end sections simultaneously,the linear explosively-formed penetrators(LEFP) is investigated,based on a detonation wave collision.The theoretical pressure of a detonation wave collision is calculated first,which is described as the LEFP critical pressure for formation.Then,the LEFP is numerically simulated using LS-DYNA.Furthermore,pulsed X-ray LEFP forming experiments as well as LEFP penetration experiments under different stand-off are performed.Based on the results obtained from both the numerical simulation and the experiments,the formation mechanism of the LEFP is explained clearly.The theoretical analysis,numerical simulation and experimental results demonstrate that near-half-cylindrical LSCs can form a large L/D ratio LEFP based on a detonation wave collision.