Optimization Of Combined MEFP Warhead Parameters Under Strong Dimensional Constraints

In view of the shortcomings of a single EFP having more damage effect but few damage areas,the MEFP warhead has drown more and more attention from domestic and foreign experts and scholars.And the axial combined of MEFP,as a warhead of series superposition of single EFP,has a very important meaning in light armor damage.In this paper,the theoretical analysis,numerical simulation and experimental research are combined to study the structure of the axial combined MEFP warhead and the velocity and the shape of the subEFP.First of all,based on the forming theory and design theory of single EFP,the positioning and size design of sub-EFP for the MEFP warhead with Φ110 mm in diameter were conducted.The diameter of the sub-EFP was determined to be Φ40 mm,the number of which was 3,and the actual fabrication process was considered.The entire warhead was structurally designed and assembled,including explosive charges,liner,flame-proof materials,housings and end caps.Then,the optimal single EFP structure was put into the combined MEFP warhead.Comparing the speed and shape of a sub-EFP projectile with a single EFP projectile and it has been found that the best single EFP structure cannot be applied to warheads with such charge caliber and sub-EFP spacing.The simulation,the sub-EFP pattern and theoretical analysis were used to explore the reasons for the asymmetric projectile.Then,two new solutions to the asymmetric projectile under fixed-size constraints method: Asymmetrical structure liner and Asymmetrical explosive charge.Through the design and simulation of asymmetrical liner and asymmetrical explosive charge,the aerodynamic shape under this caliber is relatively better,and the projectile with greater damage could be obtained.And the influence law of the sub-EFP distance,the density of explosion-proof material and the detonation delay time on the divergence angle of combined MEFP was investigatedFinally,the theoretical analysis and simulation analysis of the optimized warhead structure for optimal penetration have verified that the sub-EFP can penetrate the A3 steel plate at a distance of 50 m,which has certain application value.