偏心药型罩在 D 型装药中的设计及成型性能研究

In order to solve the problem of poor closure of liner mouth at the edge in the integrated multiple explosively formed projectile (MEFP) warhead, an eccentric liner with different wall thickness along the circumferential direction is designed. The liner is applied to a D-shaped charge structure warhead. The effects of the thick-side orientation and eccentricity of liner on liner forming are studied through theoretical analysis and numerical simulation. The soft recovery experiment of explosively formedprojectile(EFP) was carried out. The results show that the thick-side orientation and eccentricity of eccentric liner have little effect on the velocity of EFP in each direction, but have a great influence on the EFP forming effect. The forming effect is best when the thick-side of liner is oriented to the center of the warhead. The size of eccentricity can adjust the speed difference of the micro element around the liner to the center, and improve the wrapping situation of liner mouth. And the test result of EFP is in good agreement with the simulated result. The eccentric liner can optimize the formation of EFP under oblique detonation by adjusting the matching relationship between the thickness of liner and detonation intensity. It can effectively solve the problem of poor shape of liner when the MEFP warhead with D-shaped charge structure is located at the edge. It provides reference for the structure design of liner at the edge of the integrated MEFP warhead.