In order to study the penetration ability of long rod projectile into non-explosive reactive armor, a numerical simulation model of long rod projectile penetrating into non-explosive reactive armor at different target angles is established by using LS-DYNA software, and the influence of different target angles on the penetration process of projectile is analyzed. Through the analysis of simulation results, it is known that when the target angle reaches 40 °, the impact of the target plate on the projectile body is the most serious. When the target angle is between 30 ° and 40 °, the damage degree of the projectile body is much greater than that below 30 ° with the change of the angle.
The study of new combat head structure is of great significance to the anti-missile warhead, using a typical shrapnel combat head structure as the background, a simulation analysis was conducted using a flat head structure and an isosceles trapezoidal cross-section head structure to study the effects of the two types of shrapnel head structures on shrapnel fragmentation. Computer-aided software LS-DYNA was used to simulate the whole process of the explosive drive of the combat section. The simulation results show that the isosceles trapezoidal head structure can significantly increase the dispersion velocity and dispersion angle of the prefabricated fragment, and significantly increase the axial blockage area of the prefabricated fragment, which greatly enhances the axial force of the combat section of the shrapnel. After simulation analysis, it can be seen that the isosceles trapezoidal head structure is more effective in destroying the warhead, which can provide reference for the design of anti-missile warheads.
In order to conduct a comprehensive vulnerability analysis of armored vehicles, we developed armored vehicle target vulnerability database software using Visual Studio 2019 software development tool and Sqlite database software. The software consists of modules such as target function and structure analysis, target damage level and damage tree, target equivalence model and target damage criterion, which contain various conditions for vulnerability analysis of armored vehicles and lay the foundation for damage assessment of armored vehicle targets.
In order to explore the efficiency of cylindrical fragments of different materials penetrating the target in different contact gestures, the WorkBench-LsDyna software is used to simulate the cylindrical fragmentation under different working conditions, assuming that the fragment’s speed is 1800𝑚/𝑠, and the target is vertically held with different gestures. Simulation results show that when cylindrical fragments penetrate the target, the side edges first penetrates the target with the strongest penetration, and the cylindrical side penetrates the target with the worst ability; When cylindrical fragments of different materials penetrate the target, the greater the density under the same structural size, the stronger the penetration, and there is less energy loss and larger residual velocity after penetrating the target, but the impact of the structural size on the penetration of the fragment should be considered when designing the cylindrical fragment.
KEYWORDS: Computing systems, Design and modelling, Data storage, Data acquisition, Telecommunications, LabVIEW, Dynamical systems, Sensors, Human-machine interfaces, Data communications
The traditional pressure testing system has some problems, such as low data accuracy and inconvenient data storage. This paper introduces a dynamic pressure testing system based on STM32 microcontroller. Proteus is used to complete the hardware design of the testing system. Keil uVision 5 and LabVIEW are used to complete the software design of the lower and upper computers of the testing system. The dynamic pressure testing system is simulated by Proteus, and the simulation results show that the whole testing system can well complete the dynamic pressure testing task, and achieve the expected goal.
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