Critical penetration velocity of prefabricated fragment in penetrating homogeneous armor steel plate
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摘要: 通过对预制破片侵彻均质装甲钢的过程进行受力分析，推导预制破片极限穿透速度的计算公式，分别对3种形状规则预制破片的极限穿透速度进行理论计算，并通过实弹驱动试验和弹道枪模拟复核试验测得极限穿透速度与理论计算结果相对比，得出理论计算结果与试验结果的误差，通过数据分析处理给出计算公式的修正系数。Abstract: In this study, we at first made a mechanical analysis of the process of the prefabricated fragment penetrating fully the homogeneous armor plate using theoretical calculation and experimental study, and derived the penetration velocity respectively for three shapes of prefabricated fragments. Then, by combining live testing with simulation, we obtained this penetration velocity and had it compared with the theoretical calculation results, thereby arriving at the error between them and coming out with the revised coefficient for the critical penetration velocity.
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图 2 预制破片着靶几何关系
Figure 2. Geometrical relationship of prefabricated fragment and target
图 5 3种形状预制破片模拟弹头
Figure 5. Simulated warheads of prefabricated fragments in three shapes
图 8 预制破片极限穿透均质钢板前嵌入状态
Figure 8. Embedded state of prefabricated fragment before fully penetrating homogeneous steel plate
表 1 3种形状预制破片和装甲板参数
Table 1. Parameters of prefabricated fragments and armor
形状 破片尺寸 m/g h/mm τy/MPa 方形 a=7.3 mm 7.00 10 1 700 圆柱形 R=4.0 mm H=7.0 mm 6.33 10 1 700 球形 R=2.5 mm 4.70 10 1 700 
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表 2 预制破片垂直侵靶和斜侵靶时理论计算数据
Table 2. Calculation data of target's vertical and oblique penetration by prefabricated fragment
破片形状 m/g S/mm2 L/mm vL/(m·s-1) 垂直侵彻 斜侵彻 垂直侵彻 斜侵彻 垂直侵彻 斜侵彻 垂直侵彻 斜侵彻 方形 7.00 7.00 53.29 72.80 29.20 20.65 667.1 1 024.1 圆柱形 6.33 6.33 56.00 48.50 30.00 25.98 690.5 1 049.3 球形 4.70 4.70 19.63 19.63 15.70 15.70 654.5 902.7
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表 3 预制破片侵靶试验结果
Table 3. Test results of prefabricated fragment penetrating target
破片形状 m/g v0/(m·s-1) vr/(m·s-1) 试验1 试验2 平均 试验1 试验2 平均 方形 7.00 1 031.9 1 057.4 1 044.7 146.7 134.6 140.7 圆柱形 6.33 1 069.4 1 073.3 1 071.4 233.8 201.0 217.4 球形 4.70 915.7 920.3 918.0 153.6 101.4 127.5
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表 4 弹道枪试验结果
Table 4. Test results of ballistic gun
破片形状 m/g W/g v0/(m·s-1) vr/(m·s-1) 试验1 试验2 试验3 平均 试验1 试验2 试验3 平均 方形 7.00 28 979.2 986.3 1 001.8 989.1 128.7 131.6 123.6 128.0 圆柱形 6.33 30 1 040.2 1 010.7 997.1 1 016.0 233.8 201.0 210.7 215.2 球形 4.70 25 870.2 879.3 880.5 876.7 153.6 101.4 121.4 125.5
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