Research On The Damage Of The Top Armor Of Tank And Armored Vehicle By Combined Effects Warhead

On the current land battlefield,there are not only heavy armor protection targets such as tanks,but also light armor protection targets such as infantry fighting vehicles and various armored vehicles.With the increase of the complexity of the modern land battlefield situation,it is difficult for a single explosive shaped projectile-type warhead to achieve wide-area coverage damage on the basis of achieving higher penetration depth,while multi-explosive shaped projectiles can expand the damage range,but The depth of penetration of the target armor is severely reduced compared to a single explosively formed projectile.In order to achieve a greater depth and damage range,Combined Effects Warhead(CEW),has become an important development direction for improving the damage capability of the warhead.In order to better design the combined effects warhead and improve the damage of the modern tank and the armor of the armored vehicle,this paper designs a shaped charge structure based on the work of the predecessors,which can simultaneously form a central EFP and Multiple perimeter EFP.Then,using the nonlinear dynamics software LS-DYNA,the numerical simulation of the explosion forming process of the combined effects warhead was carried out.Then,the speed and the aspect ratio of the center EFP are orthogonally optimized from the structural parameters of the liner,and the combination of the highest speed parameter combination and the aspect ratio is obtained.Because the combined effects warhead needs to be the large-explosive high-level combat environment worked,so the above-mentioned parameter combination scheme was abandoned,and the optimal aerodynamic stability scheme was determined.Finally,the penetration ability of the central EFP of the selected scheme and the surrounding EFP is analyzed.The research indicates:(1)In the case where the overall structural parameters of the combined effects warhead type warhead such as the charge height and the maximum outer diameter of the casing are determined,the structural parameters of the liner have an important influence on the formation of the damage element.(2)When the radius of curvature of the central liner is equal to the caliber,EFP with good aerodynamic stability can be formed;as the thickness of the central liner increases,the speed of the central EFP also decreases;The center EFP is best formed when the top thickness of the cover is the same as the thickness of the bottom of the liner.(3)The larger the radius of curvature of the peripheral liner,the larger the aspect ratio of the formed peripheral EFP.When the thickness of the peripheral liner is increased,the average speed of the peripheral EFP is also reduced.When aluminum is used as the peripheral liner material,the peripheral EFP velocity gradient is too large,causing the breakage;when the steel is used as the peripheral liner material,due to its poor plasticity,each peripheral EFP breaks into two fragments;.When copper and tantalum are used as the periphery liner material,a slender dense EFP is formed;when tungsten is used as a peripheral liner material,a short and thick hemisphere having an irregular shape is formed.(4)Under the application condition of large-explosive height,when orthogonal optimization is applied to EFP forming,only the speed and aspect ratio are used as optimization targets to select the optimal parameter combination scheme,and the aerodynamic stability of EFP should also be considered..(5)The central EFP formed by the combined effects warhead and the surrounding EFP have achieved efficient damage to the top armor of tanks and armored vehicles.