低速平头弹对叠层靶侵彻性能的数值模拟研究

当新型的平头弹以一定的速度碰击混凝土及土壤叠层靶时,将产生更大的冲击过载,对壳体及内部结构产生更多的不利影响,为阐述其侵彻时的过载规律,应用三维有限元软件LS-DYNA,对平头弹侵彻混凝土及土壤叠层靶的过程进行了数值模拟研究,混凝土及土壤叠层靶的变形损伤情况与试验结果十分吻合,对平头弹的侵彻性能进行了分析,结果表明:对于直径为69mm、质量约1.8kg的平头弹,当其碰击速度在77～96m/s时,相应的过载值可达到38640～48300g.

Numerical Study on Penetration Performance of Low-velocity Flat-nose Projectile into Two-Laminated Target

When the new-style flat-nose projectile impacts the two-laminated target composed of the concrete and the soil at a certain velocity, the great inertia force produced by the high deceleration will make worse effect on the structural strength of the projectile shell and its internal components. By using the three-dimensional LS-Dyna finite element software, the penetration of the flat-nose projectile into the concrete and soil target at different velocity was simulated. The phenomena of the concrete damage were in agreement with the experimental results. The penetration performance of the flat-nose projectile was discussed. As for the flat-nose projectile with the diameter of 69mm and the mass of 1.8kg, the penetration deceleration will reach 38640~48300g at the impact velocity about 77~96m/s.