Influence of the Distance of the Multi-Layer Parallel Plate Charge on Interfering Shaped Charge Jet
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摘要: 基于平板装药与聚能射流的作用原理和应对大口径带隔板侵彻能力更强的聚能装药的需求，通过理论分析和数值模拟的方法，对比研究了单层平板装药、双层平行平板装药和多层平行平板装药对聚能射流的干扰能力，发现随着平板装药层数的增加，多层平行平板装药对聚能射流的干扰能力增强。平板装药之间的距离不仅决定了多层平行平板装药对聚能射流的干扰效果，而且决定了反应装甲的尺寸。采用ANSYS/LS-DYNA3D软件再现平板装药与聚能射流的相互作用的过程，综合对比某一时刻聚能射流的剩余速度、剩余动能、后效，优选出最佳的平板装药之间的距离δ=25 mm时，不仅保证了多层平行平板装药对聚能射流的干扰效果而且能有效控制反应装甲的尺寸和重量，可为后期新型反应装甲的研制提供参考。Abstract: On the basis of the interaction of the plate charge with the shaped jet and in view of the greater penetration capability required for the large caliber plate's more concentrated charge, this article contrasts and compares the shaped jet interference capability of the single plate charge, the double parallel plate charge and the multi-layer parallel plate charge using theoretical analysis and numerical simulation.It was found that the shaped jet interference capability of the plate charge is greater with the increase of the plate layers.The distance between the plate charges determines not only the jet interference capability but also the size of the reactive armor.The article represented the process of the interaction between the plate charge and the shaped jet using the ANSYS/LS-DYNA 3D software, and compared the residual velocity, the residual energy and the after effect of the shaped jet at some point and obtained the optimum distance (δ=25 mm) between the plate charges, thereby not only ensuring the interference effect of the multi-layer parallel plate charge on the shaped jet but also effectively controlling the size and the weight of the reactive armor.The results can serve as reference for development of new reactive armors.
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Key words:
- multi-layer parallel plate charge /
- reactive armour /
- shaped charge jet /
- after effect
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图 3 130 μs时3种结构的反应装甲与聚能射流相互作用的压力分布图
Figure 3. Pressure distribution in 3 reactive armors' interaction with the interference shaped charge jet at 130 μs
图 4 130 μs时不同距离的三层平行平板装药与聚能射流的作用效果图
Figure 4. Design of three-layer plate charge with different distance disturbing shaped jet at 130 μs
图 5 130 μs时聚能射流与不同间距三层平行平板装药作用后聚能射流的速度分布图
Figure 5. Velocity profile of three-layer plate charge with different distance disturbing shaped jet at 130 μs
图 6 130 μs时聚能射流与三层平行平板装药相互作用后射流的头部剩余速度和射流的动能曲线
Figure 6. Velocity and kinetic energy of shaped charge jet after interaction between shaped charge jet and three-layer parallel plate charge at 130 μs
表 1 平板装药夹层炸药的材料参数
Table 1. Material parameters of flat charge explosive
ρ/(g/cm3) pCJ/(GPa) I/(μs-1) G1/(μs·GPa-1) c y λG2，min λig，max 1.717 27 4.4×10-11 310 0.667 1.0 0 0.3 
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