Amplifying Effect of Spacer Shaped Charge on Eccentric Initiation
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摘要: 带隔板的聚能装药可有效调整爆轰波形，提高射流的侵彻能力。偏心起爆会导致射流弯曲偏转和速度降低等现象，即偏心起爆效应。现实生产工艺中，聚能装药战斗部的起爆点和隔板的安装不易实现对称控制，基于此问题，应用LS-DYNA有限元软件和ALE算法讨论聚能战斗部中隔板对偏心起爆下产生射流的影响。经对比有无隔板的聚能装药在不同偏心起爆距离下产生射流的形态及速度分布，结果表明：有隔板的聚能装药对偏心起爆效应具有放大作用，且偏心距离越大，放大作用越明显。Abstract: Spacer shaped charge can effectively adjust the detonation wave to improve the jet penetration capability; asymmetric initiation may lead to eccentric jet deflection, speed reduction and other phenomena, which is called the eccentric initiation effect.In the actual production process, however, it is difficult to control the detonation point of the shaped charge warhead and the installation of the wave-shaper.The present work investigated the effect of the partition on the shaped charge jet under eccentric initiation by using a finite element software LS-DYNA with ALE algorithm, and compared the forms and velocity distributions of the shaped charge jet at different eccentric amounts with and without partition.The results show that the shaped charge with a separator amplifies the eccentric initiation effect, and the greater the eccentric amount, the more obvious the amplifying effect.
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Key words:
- wave-shaper /
- eccentric detonation effect /
- eccentric amount /
- shaped jet /
- LS-DYNA
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图 1 有无隔板时的模型示意图
Figure 1. Schematics of the simulation model with and without partition
图 2 无隔板聚能装药在偏心起爆时的爆轰波传播示意图
Figure 2. Detonation wave propagationin shaped charge without partitionunder eccentric initiation
图 3 有隔板聚能装药在偏心起爆时的爆轰波传播
Figure 3. Detonation wave propagation in shapedcharge with partition under eccentric initiation
图 4 有无隔板的聚能装药在不同偏心起爆距离时的爆轰波示意图
Figure 4. Detonation schematic of shaped charge with andwithout partition at different eccentric distances
图 5 有无隔板的聚能装药在不同偏心起爆距离下射流的形态分布
Figure 5. Jet form distribution of shaped charge with and without partition at different eccentric distances
表 1 有无隔板的聚能装药在不同距离偏心起爆下的参数
Table 1. Jet parameters of shaped charge detonation with and without partition at different eccentric distances
Eccentricity/(mm) Velocity of jet head/(m/s) Velocity of jet tail/(m/s) Stretching length of jet/(cm) Without partition With partition Without partition With partition Without partition With partition 0 6 098 9 572 1 307 842.9 46.33 79.44 1 5 857 7 009 1 298 687.9 45.00 55.22 2 5 817 6 932 1 295 691.9 44.34 52.53 3 5 727 6 953 1 288 688.5 43.35 54.15 4 5 726 6 744 1 286 671.8 43.68 51.70 5 5 693 6 633 1 271 831.3 44.03 48.13 
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