Based On The New Efp Research, Detonation Wave Collisions Principle

Aimed at liner charge and based on detonation wave collision theory, the collision pressure, formation of new EFP and penetration capacity was studied. The overpressure whose peak is up to 2 times as non-collision pressure was found, when two detonation waves collide. It is new EFP that the collision theory is used for linear charge. After collision the greater velocity gradient was generated, which brought liner convex and closed to collision zone. Finally the penetrator of greater velocity, mass and length-width was formed. New EFP can not only improve the power, but also attack the top and side of armored vehicles. Simultaneously for the superiority of linear charge, new EFP combined of LEFP can achieve optional attack. So it has broad application prospects.The theoretical calculations and numerical simulation were used to analyze collision pressure. On the basis, the numerical simulation and experimental were used to research the formation and penetration of new EFP. The main content includes:(1) The collision pressure was researched. The collision pressure in different collision angle was calculations theoretically. Simultaneously the numerical simulation was used to calculate collision pressure in different L/H and the results was compared with theoretical value. As the increase of angle, the regular oblique collision form was turned into non-oblique collision, and the collision pressure attenuated after increase up to peak.(2) The formation and penetration of new EFP was researched. The numerical simulation was obtained, and on the basis, the multi EFP was studied and it was verified by experiment. Simultaneously the benefit of grooving was studied.(3) The factors influenced formation of new EFP was researched. The L/H, liner thickness, height and initiation error are the four key one in numerous factors. The numerical simulation was obtained to study these factors and it provides the basis for the optimization of charge. The L/H and height of charge influence collision pressure; liner thickness influences the mass driven by pressure; initiation error brings about asymmetric collision.(4) The formation and penetration capacity of new EFP was compared with LEFP. It includes the characteristic on detonation wave propagating, velocity and velocity gradient of penetrator. Finally, the experimental research was combined with numerical simulation to study the penetration capacity of new EFP and LEFP.