Study On Damage Effect Of Prefabricated Fragments On Light Armored Vehicles In Typical Environment

The modern land battlefield environment is complex and ever-changing,and the ultimate damage of range type warhead damage elements to battlefield targets is easily affected by environmental factors.Environmental media may reduce the killing ability of damage elements,thereby affecting the ultimate damage effect of warheads on targets.This article focuses on the urban and forest environments in land battlefields,using prefabricated tungsten alloy fragments as damage elements and light armored vehicles as targets,analyzing the damage effects of fragments on two environmental media,and studying the impact of environmental media on the final power of prefabricated fragments.This article briefly discusses the characteristics and parameters of media in two typical battlefield environments(urban and forest),analyzes the main material properties of the media in the environment,and obtains the residual velocity of prefabricated spherical fragments and the damage characteristic parameters of environmental media targets based on experiments of high-speed fragments on concrete and wood media.By comparing experiments and numerical simulations,the two material parameters in the numerical simulation were modified.Based on the experimental and simulation parameters,a single fragment penetration calculation was conducted on the environmental medium target under different initial fragment conditions.The damage analysis of the two medium targets under different penetration conditions was conducted to obtain the impact of environmental medium parameters on the remaining velocity of the fragments.Based on the damage situation of single fragments to concrete target plates,after studying the damage effects of fragments on concrete direct and oblique penetration,a joint damage analysis was conducted on concrete medium target plates under multiple fragments.The joint damage characteristics of concrete target plates were obtained,and a joint damage analysis method of double fragments on concrete was established.The orthogonal optimization method was used to analyze the influence of fragment parameters on joint damage.Based on the characteristics of wood target plates,the characteristics of trees in forest environments were equivalent and analyzed,and a calculation method for the penetration path of fragments into forest environmental media was established.Based on this method,the remaining velocity of fragments in forest environments can be easily calculated.Based on the target vulnerability analysis method,the "Cloud Leopard" light armored personnel carrier was selected as the target,and its structural components and functional systems were three-dimensional modeled.By constructing a vehicle model and combining functional and structural analysis,a damage tree for this type of vehicle was established.Based on target armor protection with different thicknesses,numerical simulations were conducted using LS-DYNA software to investigate the penetration of fragments into armored steel targets under different operating conditions.The residual velocity of fragments under forward and oblique penetration conditions was analyzed,and the damage results of prefabricated fragments on three different thicknesses of armored steel targets were obtained.By assuming the intersection conditions of projectiles and targets in two typical battlefield environments,the impact of environmental media on the fragmentation process and final damage to targets in urban and forest environments was analyzed.Hypothesis and analysis were conducted on the characteristics and parameters of two environmental media,and the effects of multi-layer spacing targets and edge effects on wood target plates in forest environments were studied;A calculation method for the damage of concrete media to fragments in urban areas has been established.Through numerical simulation and model analysis of environmental media,it is easy to obtain the evaluation of the fragmentation killing ability of the media in the environment.Taking a single fragment as an example,the damage impact of fragments penetrating the environmental media on the target in real environments was analyzed.Based on the analysis of material properties of environmental media and the impact of environmental media on target damage ability,the actual damage calculation results of missile target intersection parameters in actual combat can be corrected.