Protection Design And Simulation Analysis On The Electric Testing System Of Hard Target Penetration

Hard target penetration is usually by means the process of a projectile penetrating into steel armor or reinforced concrete target, the components and electronic equipment are under overload value up to104g～105g (g=9.8m/s2) level, the conditions is very strict for the warhead charge and electronic products such as intelligent electronic fuze, and high speed penetration and multiple penetration will be more severe conditions. Hard target penetration test is mainly used for penetration dynamics experimental research, dynamic response characteristics of target recognition, projectile material dynamic response research, etc.; At present, low penetration and single target penetration test are more common, and usually are based on experimental research, the theoretical study and numerical simulation analysis are not enough. Therefore, It’s very important to carry out theory study, numerical simulation method and experiment technology, high overload protection technology research of hard target penetration test system under the condition of multiple hard target.Aiming at the hard target test system to carry out the following research:(1) The main factors are analyzed, and the protection design decision condition is given.(2) Simplified theory mode is established. Based on one-dimensional stress wave transmission theory and energy conservation theory, material parameters and structure parameters of the reference formula is deduced.(3) Application of finite element simulation and analysis tool, numerical analysis is done for the simplified model, it reproduces the impact stress propagation process, the stress and acceleration change process was analyzed and the energy absorption is analyzed; The results show that the theoretical design can better guide structure protection design, circuit module is given with the theory of stress level to meet the stress protection design requirements, buffering module energy absorption can meet design requirements as expected. (4) The combination of simulation and experimental method, the theoretical design of the missile test system protection structure is tested and verified through a high g value impact experiment and artillery live ammunition penetration experiment. The results show that the acceleration curve and the result are in good agreement with numerical simulation and theoretical design of hard target penetration. The missile test system can withstand high penetration, the experiment successfully getting the overload process curve, indicates that the theoretical results and numerical simulation method is credible.