冲击波叠加效应对组合式多爆炸成型弹丸成形的影响研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (1) : 56-60.

论文

冲击波叠加效应对组合式多爆炸成型弹丸成形的影响研究

张洋溢1,2; 龙源1; 纪冲1; 马海洋1; 周翔1; 何洋扬3

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Study on the superposition effect of shock waves in the formation of the grouped multiple explosive formed projectile

ZHANG Yang-yi1 2; LONG Yuan1; JI Chong1; MA Hai-yang1; ZHOU Xiang1; HE Yang-yang3

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摘要

为探明组合式多爆炸成形弹丸（MEFP）弹丸的成形机理、研究形成良好弹丸的关键因素，运用LS-DYNA显式动力学软件对同时起爆和时差起爆条件下组合式MEFP成形过程进行了数值模拟计算，并对多个子装药爆轰场冲击波叠加效应进行了理论分析。研究表明：导致中心弹丸易于断裂、速度较快，周边弹丸形状不对称的主要原因是侧壁和罩顶反射冲击波的叠加作用；选用低密度吸能效果较好的填充介质可以减小反射波的强度从而减弱其叠加效应；当起爆时差超过5µs，中心子装药的药型罩会出现过度压垮的现象，不利于弹丸的成形。研究成果为战斗部填充介质的选取、合理装药间距的确定、多点起爆器材精度的确定等关键技术提供了理论依据

Abstract

To investigate the forming mechanism of Multiple Explosive Formed Projectile（MEFP）and find the key factors effecting forming aerodynamic projectile, LS-DYNA was used to simulate the forming process of the grouped MEFP on the condition of simultaneous and asynchronous detonation. Also the superposition effect of shock waves was theoretical analyzed. The study indicates: the superposition of the shock waves which are reflected by parietal cliff of the charge and top of the liner is the reason of the center projectile tend to break with a bigger velocity and the around projectile has an asymmetrical shape; Choosing a low density filled material with a good energy absorption characteristic can minimize intensity of the reflect waves and superposition effect; When the detonating delay is bigger than 5µs, the liner of center charge would be “over collapsed” which is against the formation of the projectile. The conclusions can supply a theoretic basis for choosing a property filled material、confirming the space between the charges and adjusting precision of the multi-point detonating equipment.

导出引用

张洋溢;龙源;纪冲;马海洋;周翔;何洋扬. 冲击波叠加效应对组合式多爆炸成型弹丸成形的影响研究[J]. 振动与冲击, 2012, 31(1): 56-60

ZHANG Yang-yi;LONG Yuan;JI Chong;MA Hai-yang;ZHOU Xiang;HE Yang-yang. Study on the superposition effect of shock waves in the formation of the grouped multiple explosive formed projectile[J]. Journal of Vibration and Shock, 2012, 31(1): 56-60