In order to study the damage performance of micro-shaped charge with different materials, the AUTODYN finite element software was used to simulate the formation process of damage element and the penetration performance of micro-shaped charge to target when the liner material was copper, Teflon and nylon. The results show that although the head velocity of the damage element formed by the copper liner is the smallest, the penetration depth to the target is the deepest, and that of the nylon liner is the largest, but the penetration depth to the target plate is the smallest. The head velocity of the damage element formed by the Teflon material liner and the penetration depth to the target are between the two.
Artificial intelligence technology and image recognition technology are playing an increasingly important role in information warfare, while battlefield image recognition and information processing are at the heart of information processing in warfare. This research will use deep learning image recognition technology and QT development platform, combined with target damage tree analysis and Bayesian network inference method, to research and develop the design of large-scale surface warships damage assessment system. A large-scale surface warships damage assessment system was designed. The system can quickly identify the target large-scale surface warships type with an accuracy rate of over 91%. On this basis, damage assessment is carried out in terms of target vulnerability, combatant power analysis, and bullet-eye rendezvous. A new damage classification is established. The system can improve the efficiency of large-scale surface warships damage assessment, can be well combined with the front-line information collection pictures to assess, and overcome the traditional large-scale surface warships damage assessment and problems of slow and inaccurate manual processing of raw data. It provides a new way of thinking for large-scale surface warships damage assessment research.
Tandem shaped charge is one of the hotspots in the research of antiarmor ammunition at present, but because of the shortcoming that the front-stage jet penetrates and detonates ERA (Explosive Reactive Armor), then it will affect the rear-stage jet to penetrate the main armor. Our research team proposes that the front charge of the tandem shaped charge can be designed as a low-density material charge liner so that the front-stage low-density jet can penetrate a small hole in the reactive armor without detonating. The rear-stage main charge forms a main jet through the small hole to penetrate the main armor. In this article, the damage of tandem shaped charge to armored target is studied when copper and new modified PTFE (polytetrafluoroethylene) materials are used as front-stage charge liner, and the numerical simulation results are verified by experiments. The numerical results show that the Cu (copper) jet formed by tandem shaped charge of double-copper material has strong impact performance. The interlayer explosive in reactive armor is detonated in the process of penetrating reaction armor, which weakens the penetration ability of the main rear-jet. However, the interlayer explosive in the reactive armor is not detonated during the penetration of the double-material tandem shaped charge. The front-stage modified PTFE jet and the rear-stage main jet are not affected by the explosion loading before penetrating the main armor. The experimental results show that the double-material tandem shaped charge overcomes the shortcoming of the influence of the front-stage explosion, and the penetration depth of the main armor reaches 703 mm, which is 14.3% higher than the penetration ability of the double-copper tandem shaped charge, which is basically consistent with the numerical simulation results. It provides a reference for improving the damage ability of tandem shaped charge to armored target.
Using ANSYS simulation software, the experimental simulation and numerical analysis of anti-12.7 mm tungsten alloy armor-piercing in different mezzanine layers of sandwich structure protection plate were carried out. The upper and lower panels of the sandwich structure are armored steel and the mezzanine is aluminum alloy. The anti-intrusion performance of the protective plate in different mezzanine structures is simulated and analyzed. The results show that the sandwich structure porous shield has excellent performance against kinetic energy, and the protective performance is better than the holeless shield plate structure under the same surface density condition. In the simulated three sets of tests, the porous shield with an aperture of 3 mm has better anti-intrusion protection performance.
In order to study the impact of shallow water explosion shock wave on the ship damage and the overpressure distribution law under different burst points and different explosive quantity and charge, the TNT column bare charge is selected, based on LS-DYNA finite element software, the underwater explosion model is created, and the numerical simulation study of underwater explosion under different burst points is carried out, and the correctness of the finite element model is verified by comparing with the empirical formula. The results show that: the numerical simulation of the underwater explosion shock wave results affected by the mesh size, the use of explosive diameter of 1/10 ~ 1/5 of the mesh size can be more accurate simulation results; the use of torpedo scattering mode of operation, the bottom of the middle part of the ship after hitting the damage effect is much greater than when not hit, hit the ship and the head and stern side of one of the best damage effect; only hit the stern sides of the case when, 100kg of explosives can do the same or better than 200kg of explosives damage effect, can save part of the resources. It can provide some reference for the study of shallow water explosion damage to ships and torpedo dispersal operations.
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