Formation and Penetration Performane of Multi-Explosviely Formed Projectiles
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摘要: 为了提高一体式多爆炸成型弹丸(MEFP)的成型效果及侵彻能力,通过数值模拟分析了药型罩形状及壁厚、壳体厚度、起爆方式、破片支架对其成型及速度的影响,在此基础上给出了一种一体式MEFP战斗部,通过实验验证了该一体式MEFP战斗部结构的成型、散布特征及侵彻性能。结果表明:该战斗部可形成17枚聚能杆式弹丸(JPC),且单个JPC形状、飞行方向稳定,飞散角为14.5°,与实验结果14.8°吻合良好;该MEFP战斗部可对12mm厚的603装甲钢靶板造成有效毁伤。Abstract: In order to improve the formation and penetration performance of multi-explosively formed projectiles (MEFP), we analyzed the influence of the charge cover (both its shape and wall thickness), the shell thickness, the explosive initiation modes as well as the fragments bracket on the projectiles formation effect and velocity by numerical simulation method.Based on our analysis, we proposed an integral MEFP warhead, and verified experimentally its formation process, scattered characteristics and penetration performance.The results show that the MEFP can form 17 jetting projectile charges (JPC), each with a good shape and stable flight direction.The calculated flying angle of the MEFP is 14.5°, which is well accord with the experimental result 14.8°.This MEFP warhead can effectively damage the 603 armor steel plate with a thickness of 12mm.
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表 1 3种药型罩结构尺寸及EFP速度
Table 1. Structural parameters of 3 kinds of charge covers and the EFP velocities
Structure R/
(mm)h1/
(mm)h2/
(mm)r1/
(mm)r2/
(mm)α1/
(°)α2/
(°)v/
(m/s)Equal wall thickness conical 8 2.00 2.00 134 140 755 Equal wall thickness conical dome 8 2.00 2.00 11.35 11.35 136 136 818 Variable wall thickness conical dome 8 1.64 2.00 11.25 12.23 134 140 958 表 2 壳体厚度与EFP速度的关系
Table 2. EFP velocity vs. shell thickness
Shell thickness/(mm) EFP velocity/(m/s) 0 891 2 928 4 934 6 941 8 945 表 3 不同起爆方式下的EFP速度及MEFP飞散角
Table 3. EFP velocity and MEFP flying angle under different initiation modes
Initiation modes EFP velocity/(m/s) Flying angle/(°) Center Outer-ring Point initiation 959 395 45.72 Surface initiation 1290 1240 0.56 表 4 不同支架结构下EFP的速度及MEFP飞散角
Table 4. EFP velocity and MEFP flying angle with different brackets
Bracket EFP velocity/(m/s) Flying angle/(°) Center Middle Outer-ring Center Middle Outer-ring Plane bracket 1300 1230 1140 0 8.3 15.6 Curve bracket 1330 1350 1410 0 16.2 28.0 表 5 MEFP战斗部各位置弹丸的飞散角
Table 5. MEFP flying angle of projectiles at different locations
EFP location Flying angle (Sim.)/(°) Flying angle (Exp.)/(°) Error/(%) Center 0 0 0 Middle 8.4 7.9 6.40 Outer-ring 14.5 14.8 2.01 表 6 孔洞大小及散布距离
Table 6. Hole size and distribution range
Hole No. Hole size Distribution range Sim./(cm) Exp./(cm) Error/(%) Sim./(cm) Exp./(cm) Error/(%) ① 7.3 8.1 11 0 0 0 ② 6.8 5.3 28 21 17 23 ③ 6.4 5.6 14 45 47 4 -
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