反爆炸反应装甲串联爆炸成型弹丸匹配设计方法

The theoretical conditions of detonation capability, separation timing and penetration ability of tandem EFP were proposed for the design of tandem explosively formed projectile (EFP) used for anti-explosive reactive armor (ERA). The ERA detonation criterion, EFP velocity decay theory and penetration theory are used to analyze the influences of shape, mass ratio and velocity gradient on detonation capability, separation timing and penetration ability. For the typical ERA of which interference time τ_e is less than or equal to 1 500 μs, the necessary conditions of the tandem EFP forming characteristics for distance H≤1 000φ(φ is charge diameter) are obtained, where 1) for the shape of sphericity-rod combination, the front and rear EFP diameter ratio d_f/d_r≤1.09, the ratio of front EFP mass to total mass is 0.17<m_f/m≤0.40, and the front and rear EFP velocity gradient Δv is larger than or equal to 150 m/s; 2) for the shape of rod-rod combination, d_f/d_r≤1.09, 0.20≤m_f/m≤0.65, Δv≥166 m/s. An EFP warhead that could form the sphericity-rod tandem EFP was designed and processed. The countering ERA linkage experiment was carried out. The process of EFP separating flight, front EFP detonating ERA, and rear EFP penetrating into target were observed by using the high speed photographic system. The experiments verified the correctness of the theory and the necessary conditions.