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Penetration and internal blast behavior of reactive liner enhanced shaped charge against concrete space

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Defence Technology（防务技术） 2022年第6期18卷 952-962页

作者： Hao Zhang Yuan-feng Zheng Qing-bo Yu Chao Ge Cheng-hai Su Hai-fu Wang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081PR China

Penetration and internal blast behavior of reactive liner enhanced shaped charge against concrete space were investigated through experiments and *** volume of the enclosed concrete space is about 15 m^(3).The reactive liner enhanced shaped charge utilizes reactive copper double-layered liner,which is composed of an inner copper liner and an outer reactive liner,while the reactive material liner is fabricated by PTFE/Al(Polytetrafluoroethylene/Aluminum)powders through cold-pressing and *** explosion experiments show that,compared with the shaped charge which utilizes copper liner,the penetration cavity diameter and spalling area of concrete by the novel shaped charge were enlarged to 2 times and 4 times,***,the following reactive material had blast effect and produced significant overpressure inside the concrete closed *** analysis indicates concrete strength and detonation pressure of reactive material both affect the penetration cavity *** the blast behavior of reactive material inside the concrete space,developing TNT equivalence model and simulated on AUTODYN-3 D for *** results reproduced propagation process of the shock wave in concrete space,and revealed multi-peaks phenomenon of overpressure-time ***,the empirical relationship between the peak overpressure and relative distance for the shock wave of reactive material was proposed.

关键词： shaped charge Penetration Blast Concrete Numerical simulation

Influence of shaped charge structure parameters on the formation of linear explosively formed projectiles

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Defence Technology（防务技术） 2022年第10期18卷 1863-1874页

作者： Tian-bao Ma Jing Liu Qi Wang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China

The research of LEFP(linear explosive forming projectile)is of great value to the development of new warhead due to its excellent *** further improve the damage ability of the shaped charge warhead,a special shell overhanging structure was designed to increase the charge based on the traditional spherical charge,in which case the crushing energy of LEFP could be ***-DYNA was used to simulate different charge structures obtained by changing the number of detonation points,the length of shell platform,the radius of curvature and the thickness of *** RSM(response surface model)between the molding parameters of LEFP and the structural parameters of charge was *** on RSM model,the structure of shaped charge was optimized by using multi-objective genetic ***,the formation process of jet was analyzed by pulsed X-ray *** results show that the velocity,length-diameter ratio and specific kinetic energy of the LEFP were closely related to the structural parameters of the shaped *** the optimization of charge structure,the forming effect and penetration ability of LEPP had been significantly *** experimental data of jet velocity and length were consistent with the numerical results,which verifies the reliability of the numerical results.

关键词： LEFP Numerical simulation shaped charge Structure optimization

Study on liquid-filled structure target with shaped charge vertical penetration

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Defence Technology（防务技术） 2019年第6期15卷 861-867页

作者： Min Guo Xu-dong Zu Xiao-jun Shen Zheng-xiang Huang School of Mechanical Engineering Nanjing University of Science and TechnologyXiaolingwei 200Nanjing 210094China Unit 63961 Peoples Liberation Army6th Beiyuan RoadChaoyang Beijing100012China

Based on the characteristic expanded hole of a shaped charge jet(SCJ) for target penetration and the reflow characteristics of liquids,the liquid-filled structure of a target disturbs the stability of the SCJ acquired in two independent *** interference jet speed interval,the escape jet speed interval,and the surplus depth are calculated on the basis of the virtual origin *** experimental results,including the velocity of the escaped jet tip and the surplus depth of penetration,are consistent with the theoretical *** show that the theory can describe the interaction process of the target with a shaped charge jet.

关键词： shaped charge Liquid-filled structure target Disturbed jet Escape jet

Reaction characteristic of PTFE/Al/Cu/Pb composites and application in shaped charge liner

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Defence Technology（防务技术） 2022年第9期18卷 1578-1588页

作者： Huan-Guo Guo Yuan-feng Zheng Suo He Qing-Bo Yu Chao Ge Hai-fu Wang Beijing Institute of Technology Institution China

In this paper, the reaction characteristic and its application in shaped charge warhead of a novel reactive material, which introduced copper(Cu) and plumbum(Pb) into traditional polytetrafluoroethylene/aluminum(PTFE/Al), are studied. The thermal analysis and chemical reaction behavior of the PTFE/Al/Cu/Pb mixture are investigated by Differential Scanning Calorimetry(DSC),Thermo-gravimetry(TG), and Xray Diffraction(XRD) techniques. Then, the shaped charge liners with PTFE/Al/Cu/Pb reactive materials are fabricated, and the X-ray experiments show that they could form reactive jets with excellent performance under the detonation effects of the shaped charge. Based on that, the penetration experiments of shaped charge with PTFE/Al/Cu/Pb reactive liner against steel plates are carried out, and the results demonstrate that the PTFE/Al/Cu/Pb reactive jets could produce a deeper penetration depth compared to the traditional PTFE/Al reactive jets. Meanwhile, the PTFE/Al/Cu/Pb reactive jets also show significant inner-blast effects, leading to dramatically cracking or fragmentation behavior of the penetrated steel plates. This new PTFE/Al/Cu/Pb reactive liner shaped charge presents enhanced penetration behavior for steel targets that incorporates the penetration capability of a high-density and ductility jet, and the chemical energy release of PTFE-matrix reactive materials.

关键词： Reactive materials shaped charge Reactive liner Jet formation Penetration behavior

Structure Design of shaped charge for Requirements of Concrete Crater Diameter

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Transactions of Nanjing University of Aeronautics and Astronautics 2015年第6期32卷 681-686页

作者：郭坚何勇肖强强黄正祥刘蓓蓓 School of Mechanical Engineering Nanjing University of Science and Technology

When shaped charge penetrats into concrete,crater diameter must meet certain *** using theories of shaped jet formation and crater diameter growth during jet penetrating concrete,we revealed the thresholds of the velocity and diameter of jet head,and therefore obtained the related structure parameters of top liner,so that shaped charge structure was *** built a?60mm copper liner and a?142mm Ti-alloy liner which followed the rules of 0.6cal and 0.7cal in-crater ***.X-ray experiment and penetration test results showed that the parameters of jet head were consistent with the results of theoretical *** in-crater diameter of?60mm shaped charge reached 36 mm,and the?142mm one reached 100 *** both met the design requirements.

关键词： shaped charge crater diameter structure design

Experimental investigation of penetration performance of shaped charge into concrete targets

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Acta Mechanica Sinica 2008年第3期24卷 345-349页

作者： Cheng Wang Tianbao Ma Jianguo Ning State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China

In order to develop a tandem warhead that can effectively destroy concrete targets, this paper explores the penetration performance of shaped charges with different cone angles and liner materials into concrete targets by means of experiments. The penetration process and the destruction mechanism of concrete targets by shaped charges and kinetic energy projectiles are analyzed and compared. Experimental results suggest that both kinetic energetic projectile and shaped charge are capable of destroying concrete targets, but the magnitudes of damage are different. Compared with a kinetic energy projectile, a shaped charge has more significant effect of penetration into the target, and causes very large spalling area. Hence, a shaped charge is quite suitable for first-stage charge of tandem warhead. It is also found that, with the increase of shaped charge liner cone angle, the depth of penetration decreases gradually while the hole diameter becomes larger. Penetration depth with copper liner is larger than of aluminum liner but hole diameter is relatively smaller, and the shaped charge with steel liner is between the above two cases. The shaped charge with a cone angle of 100° can form a jet projectile charge （JPC）. With JPC, a hole with optimum depth and diameter on concrete targets can be formed, which guarantees that the second-stage warhead smoothly penetrates into the hole and explodes at the optimum depth to achieve the desired level of destruction in concrete targets.

关键词： shaped charge JPC Kinetic energy projectile Concrete Penetration

Numerical Simulation of the shaped charge Jet Velocity Effected by Warhead Shell

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Journal of Beijing Institute of Technology 2009年第2期18卷 131-135页

作者：韩峰胡洋张函 State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology

The numerical simulation for the process of shaped charge jet produced with the shell of explosives is performed by means of the ANSYS/LS-DYNA 3D software. The effect of warhead shell on shaped charge jet velocity has been analyzed qualitatively in this paper. The numerical simulation results are creditable and in agreement well with that of the corresponding experiment. The research results show that the jet velocity of explosive with metal shell is higher than that without shell; when the shell thickness increases, jet＇ s head speed also increases; when the shell thickness increased to certain value, the jet velocity will not change any longer; with the same shell thickness, the bigger material density the higher jet＇s head velocity.

关键词： shell shaped charge jets parameters numerical simulation

Research on the Application of Explosive Network in the shaped charge Warhead

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Defence Technology（防务技术） 2011年第4期7卷 204-209页

作者：徐立新刘建荣赵广波于成大李昕张国伟 Unit No. 63961 PLA School of Mechatronic Engineering North University of China Jilin Military Representative Office

With respect to the problems of that the shaped charge warhead currently uses a cover method to improve the penetration power, a method using an explosive network technology as the detonation mode of shaped charge warhead is proposed. In the context of some shaped charge warhead, a synchronous explosive network prototype is designed according to some charge structure parameters, such as the liner and main grain. From the performance comparison test, it can be known that the explosive network not only stably detonates, but also largely improves the penetration power and stability. Experimental results show that explosive network technology is an effective method for improving the penetration power. The results lay a solid foundation for the engineering application of the technology in the shaped charge warhead.

关键词： explosive mechanics explosive network shaped charge liner warhead

Application of Wavelet Transform to Process Electromagnetic Pulses from Explosion of Flexible Linear shaped charge

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Application of Wavelet Transform to Process Electromagnetic ...