Research On The Power Performance Of A Multifunctional Warhead

Ground attack UAV has become one of the most important air combat weapons in modern battlefield.With the diversification of modern battlefield targets,traditional single function weapons can not meet the operational requirements and damage effectiveness.It is an inevitable trend to simplify the weapon system and develop multi-function weapons with the functions of armor breaking and killing.In this paper,the numerical simulation and experiment method are used to study the influence factors of the armor damage and fragment killing power of a small aspect ratio multifunctional warhead on a UAV platform,and the structural parameters of the warhead are optimized to meet the power requirements.Firstly,the armor breaking power of the multifunctional warhead is studied.This paper briefly introduces the theory of shaped jet,penetration and the influencing factors of armor breaking power.The finite element model of the multi-functional warhead is established,and the influence process of the cone angle,wall thickness,inner arc radius and blast height parameters of the liner on the jet forming quality and the armor breaking power is simulated by using ANSYS /LS-DYNA software,and the structural parameters of the multi-functional warhead are optimized according to the relevant laws obtained from the simulation.Secondly,the fragment killing power of multifunctional warhead is studied.Based on the theoretical analysis of the formation mechanism,the initial velocity and the storage velocity of fragments,the flying angle and the killing power of fragments,the formula of fragment attenuation velocity is obtained.And on the basis of the optimized model in the last chapter,the effects of the charge type,the position of the initiation point and the initiation mode on the fragment dispersion are studied by numerical simulation;the penetration process of single prefabricated fragment to Q235 steel target is simulated,and the ultimate penetration speed of fragment through the target plate is obtained.Then,the boundary effect of fragments flying angle in small aspect ratio multi-functional warhead is studied,which is verified by numerical simulation,and the flying angle of the outermost prefabricated fragments is effectively reduced,and the lethality of fragments is improved.Finally,the end effect range test was carried out.The optimized warhead structure was verified by the power index of armor breaking and the power index of fragment killing.The research results can provide reference for engineering development,test and structure optimization of small aspect ratio multifunctional warhead.