Research On Damage Efficiency Of Multifunctional Warhead Based On Aftereffect

Aiming at the problems of poor after-effect and small damage power to the personnel and equipment inside the armor,this paper puts forward a new structure of armor breaking and killing warhead.The structure can reduce the armor breaking power of the warhead,but enhance the after-effect power of the warhead by adding a follow-up ring at the bottom of the drug cover.Based on this background,the structure of warhead is improved by numerical simulation method,so that the warhead can enhance the damage power of ammunition target under the premise of satisfying the armor breaking power.Firstly,the theoretical research on the multifunctional warhead is carried out.True Grid software is used to establish the finite element simulation model of armor breaking and killing warhead,determine the range of structural parameters of the warhead,and design the simulation scheme of this topic.Secondly,the influence of the warhead structure on jet penetration is analyzed.The simulation results show that the length of jet becomes shorter when the follow-through ring is added,which leads to the reduction of armor breaking power of the warhead,but the aftereffect is enhanced.Thirdly,numerical simulation is carried out to study the armor breaking power performance of the warhead.Orthogonal optimization method is used to improve the warhead structure,and the best parameter combination is obtained as the cone Angle of the drug cap 90°,the wall thickness of 1mm,the inner circle radius of 3mm and the blast height of 100 mm.According to the corresponding parameter combination,the simulation model is established and numerical simulation is carried out.It is concluded that the maximum penetration depth of the optimized warhead is 60 mm and penetration aperture is 6.1mm,which meets the target of armor breaking power.Finally,numerical simulation is carried out on the after-effect power performance of warhead.The influence of target plate thickness,pre-controlled fragment quantity and charge length-diameter ratio on the kill power after target is numerically simulated.It is concluded that the maximum penetration depth of the optimized warhead is 30 mm after adding the follow-through ring.With the increase of the number of pre-controlled fragments with advance,the initial velocity of fragments gradually increases,and the kinetic energy increases first and then decreases.When the number of pre-controlled fragments with advance is 28,the kinetic energy of fragments reaches the maximum of 96 J.When the number of pre-controlled fragments is 16～40,the kinetic energy of fragments is above 78 J.When the number of fragments is 44,the kinetic energy of fragments is 74 J,which is not enough to kill personnel.In addition,the initial velocity and kinetic energy of the fragment with advance control increase with the increase of the charge aspect ratio.When the charge aspect ratio is 2.08～2.48,the kinetic energy of the fragment is maintained at about 130 J,which is enough to kill the target personnel.The average speed of the circumferential prefabricated fragments is 1020m/s,killing the personnel around the target,so that the comprehensive power performance of the warhead can achieve the best.The research results of this paper can provide reference for the design of multifunctional warhead of individual guided rocket.