Research On The Ignition Mechanism Of Shielding Charge Mechanical Impact

In modern warfare,air supremacy has become a core area for military competition.For the defensive side,effective interception and destruction of incoming air targets is the key to obtaining air supremacy.In order to meet the needs of national defense modernization and maintain national security,air defense and anti-missile are becoming more and more important.Therefore,it is necessary to study the damage mechanism and damage characteristics of the typical guided missile warhead by the antimissile damage element.The new generation of missiles uses high-energy insensitive charges,high-strength casings,and they are moving towards hypersonic speeds and high mobility.In order to ensure the reliable destruction of incoming missiles,it is necessary to conduct in-depth research on the damage mechanism,the characteristics of damage elements,the form of damage,and the response of missiles.In this dissertation,the combination of theoretical modeling,numerical simulation and experiment is used to study the mechanism of the detonation of shielded charges.According to the investigation,the current representative missile charge H6 explosive was selected as the charge for the simulated target bomb.The specific detonation characteristics of the H6 explosive were studied through Laplace's experiments.The corresponding explosion parameters were tested and the numerical calculation was determined.The relevant parameters of the model are studied in detail:the characteristics and damage mechanism of different missiles with different masses,different length-width ratios,different target angles,different numbers of fragments,and several types of EFP damage elements on the simulated missile firing of a typical missile warhead.Through comparative analysis of the experimental results and numerical calculation results,it is concluded that the greater the mass of a fragment,the stronger the damage capability of the simulated target bomb;the same mass fragment,the larger the aspect ratio,and the contact area when penetrating the inside of the charge.The larger the friction "hot spot" formed,the more explosive it is to detonate charge and the lower the detonation velocity threshold;the same mass fragment increases with the penetration angle,the equivalent penetration depth of the fragment increases,and the fragment detonation loading increases.The threshold value of the drug gradually increases;more fragments can be detonated at the same time by attacking the shielding explosives,and the more fragments that are hit,the lower the speed threshold for detonating the shielding charges;and the mechanism of EFP and fragment penetration is different.Between the jet and the rigid body,belonging to the plastic deformation body penetrating,and the latter belonging to the rigid body penetration;the impact of the damage than the kinetic energy as the characterization of the detonation simulation target bomb characterization is more scientific and reasonable,the higher the specific kinetic energy,the detonation of the simulation target The stronger the ability to bomb.This paper systematically studies the damage mechanism and the detonation threshold of the damage element to the shielded explosive.The research results have certain guiding significance and application value for the comprehensive in-depth design of the anti-missile warhead and the design of the highly effective damage-type warhead.