Influence of Coupled Macroscopic Deviation of Shaped Charge on Lateral Displacement of Jet
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摘要: 聚能装药宏观偏差是引发射流横向偏移的原因之一，为研究多种宏观偏差对射流横向偏移的影响规律，根据射流成形理论推导了同轴度偏差、壁厚偏差和位置偏差对射流横向偏移量的影响的理论分析模型。对存在多种宏观偏差的聚能装药采用数值模拟方法开展射流形成过程的计算，获得了各类宏观偏差对射流横向偏移量的影响规律。结果表明，单一的同轴度偏差和位置偏差均导致射流呈二次曲线状，单一的壁厚偏差使射流偏转，但射流仍保持直线状。在多种宏观偏差相互耦合的情况下，射流横向偏移量约为各单一因素引起的偏移量的矢量和。研究成果可为提高聚能装药的稳定性提供参考。Abstract: Macroscopic deviation of shaped charge is one of the reasons for lateral deviation of induced jet. In order to study the influence of multiple coupled macro deviations on the lateral deviation of jet, theoretical model considering the effects of the coaxiality deviation, the liner thickness deviation and the position deviation on the lateral deflection of the jet was deduced according to the jet forming theory. The numerical simulations of the jet forming process for the shaped charge containing multiple macroscopic deviations were carried out. The results show that the coaxiality deviation and the position deviation both cause the jet to form a quadratic curve, and the liner thickness deviation makes the jet deflect, but still maintain a straight shape. For the cases of multiple macroscopic deviations coupling, the lateral displacement of the jet is approximately the vector sum of the displacements caused by each single factor. The results provide a reference for improving the stability of shaped charge.
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图 1 聚能装药中药型罩典型宏观偏差示意图
Figure 1. Schematic diagram of typical macroscopic deviations of shaped charge liner
图 2 含典型宏观偏差的聚能装药数值模型
Figure 2. Numerical simulation models of shaped charge with macroscopic deviations
图 3 不同宏观偏差耦合时典型时刻（t=60 μs）射流成形的数值模拟图像
Figure 3. Numerical simulation images of jet induced by different coupled macroscopic deviations at t=60 μs
图 4 不同同轴度偏差时射流的横向偏移量与相对位置的关系曲线
Figure 4. Jet lateral displacement vesus relative position for different coaxiality deviations
图 5 不同壁厚偏差时射流的横向偏移量与相对位置的关系曲线
Figure 5. Jet lateral displacement versus relative position with different liner thickness deviations
图 6 不同位置偏差时射流的横向偏移量与相对位置的关系曲线
Figure 6. Jet lateral displacement versus relative position for different position deviations
图 7 不同同轴度偏差与壁厚偏差耦合时射流的横向偏移量与相对位置的关系曲线
Figure 7. Jet lateral displacement versus relative position for different coupled deviations of coaxiality and liner thickness
图 8 不同同轴度偏差与位置偏差耦合时射流的横向偏移量与相对位置的关系曲线
Figure 8. Jet lateral displacement versus relative position for different coupled deviations of coaxiality and position
图 9 不同壁厚偏差与位置偏差耦合时射流的横向偏移量与相对位置的关系曲线
Figure 9. Jet lateral displacement versus relative position for different coupled deviations of liner thicknesses and position
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