Analysis of projectile penetrating into mortar target with elliptical cross-section
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摘要: 为研究椭圆截面弹体侵彻混凝土靶规律，基于动态球形空腔膨胀理论，建立椭圆截面弹体侵彻受力模型，计算典型椭圆截面弹体阻力规律和侵彻砂浆靶深度。在此基础上，采用弹道炮发射平台，开展相同质量和长度的2种典型椭圆截面弹体及圆截面弹体垂直侵彻半无限砂浆靶实验。结果表明：理论模型能够反映椭圆截面弹体受力情况，并与实验研究结果吻合较好；椭圆截面弹体长短轴参数的改变对侵彻性能影响较为显著。Abstract: In this work, based on the theory of dynamic spherical cavity expansion, we presented a force model of penetrating projectiles with an elliptical cross-section to study their penetration performance and, using this model, calculated the resistance of the elliptical cross section and the penetration depths. Further, we performed a series of experiments of two typical elliptical cross-sectioned and circular cross-sectioned projectiles with the same mass and length penetrating perpendicularly semi-infinite grout targets at a velocity of 700 m/s to 800 m/s. The results show that the established theoretical model reflected the force condition of the elliptical cross-section and the theoretical results agreed well with the experiment, and that the size of the cross-section had a significant influence on its penetration performance.1) “第十一届全国爆炸力学学术会议”推荐论文
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图 7 静压实验中混凝土试样应力位移关系
Figure 7. Relation between stress and displacement in static compressive experiment
图 8 弹体着靶姿态高速摄影图片
Figure 8. High-speed photographs of flight attitude of projectiles before penetrating into target
表 1 实验数据与理论模型结果对比
Table 1. Comparison between experimental and theoretical data
编号 m/g γ/(°) v0/(m·s-1) dmax/mm dmin/mm h/mm z/mm ε/% 实验 理论 L1-2 460 1.6 744 430 370 66 596 590 -1.00 L1-3 451 0.6 754 380 320 60 555 593 6.85 T1-1 448 2.5 755 540 480 71 573 591 3.14 T1-2 450 1.4 747 526 416 75 553 582 5.24 T1-3 447 1.1 748 260 230 66 570 580 1.75 T2-1 451 3.3 714 480 450 69 462 443 4.11 T2-2 443 1.7 740 490 440 70 472 468 -0.85 T2-3 451 0.9 741 470 440 68 471 477 1.27 
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