Interference Effect of Multi-Layered Reactive Armor with a Variable Angle on Shaped Charge Jet
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摘要: 基于爆炸式反应装甲与聚能射流的作用机理，致力于设计出对聚能射流干扰能力更强的新型结构的反应装甲，即多层变角度反应装甲。基于ANSYS/LS-DYNA软件，采用数值模拟的方法分析了不同结构的反应装甲对聚能射流的干扰作用，对比了不同夹角的多层变角度反应装甲对聚能射流的干扰作用，以聚能射流在后效板上留下的侵彻痕迹的尺寸为判定不同夹角的多层变角度反应装甲对聚能射流干扰作用的依据。对比分析结果表明：多层变角度反应装甲对聚能射流的干扰作用明显优于V形反应装甲，多层变角度反应装甲中平板装药之间的夹角α=22°时最有利于提高其对聚能射流的干扰能力。Abstract: Based on the mechanism of explosive interaction between the armor and the jet, the present study aims to design a new structure for the reactive armor with a greater resistance against the jet interference, called multi-layered angle reactive armor with a variable angle.The effects of different armor structures and their response to the jet interference were investigated using numerical simulation, and the results were compared with the jet interference resistance capability of multi-layered reactive armor with different angles based on ANSYS/LS-DYNA.The resistance capability of the multi-layered reactive armor with a variable angle was measured based on the size of the trace of the jet penetration left on the jet-interference plate.The results of the comparative analysis showed that the jet interference resistance capability of W-shaped reactive armor is greater than that of V-shaped one, that of multi-layered reactive armor with a variable angle is the greatest when the angle of W-shaped armor is 22°.
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图 3 140 μs时单层平板装药、V形反应装甲和的多层变角度反应装甲与聚能射流的作用效果图
Figure 3. Effect of (a) the single-layer plate loaded charge, (b) the V-shaped reactive armor, and (c) the multi-layered reactive armor with a variable angle, on the shaped charge jet at the time of 140 μs
图 4 140 μs时聚能射流与单层平板装药、V形反应装甲、多层变角度反应装甲作用后聚能射流对后效靶板的作用压力云图
Figure 4. Nephogram of the shaped charge jet's effect on the target plate at the time of 140 μs.(a) the single-layer plate loaded charge, (b) the V-shaped reactive armor, (c) the multi-layered reactive armor with a variable angle
图 5 聚能射流与3种结构的装甲作用过程的动能曲线
Figure 5. Kinetic curve of the shaped charge jet's interaction with the three armor structures
图 6 140 μs时不同夹角的多层变角度反应装甲干扰聚能射流的效果图
Figure 6. Shaped charge jet interfered by multi-layered reactive armors with different angles at the time of 140 μs
图 7 聚能射流被不同夹角的反应装甲干扰后的侵彻后效
Figure 7. Penetration effect of the shaped charge jet interferedby the reactive armor with different angles
图 8 聚能射流被不同夹角多层变角度反应装甲干扰后在后效板上侵彻弹孔的尺寸
Figure 8. Size of holes on the penetrated plate resulting from the shaped charge jet interfered by multi-layered reactive armors with different angles
表 1 平板装药夹层炸药的材料参数
Table 1. Material parameters of sandwich explosive
ρ/(g/cm3) pcj/(GPa) I/(μs-1) G1/(μs·GPa-1) c y λG2，min λig，max 1.72 27 4.4×10-11 310 0.667 1.0 0 0.3 
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