为了研究卵形弹在宽速域条件下的侵彻威力,通过ANSYS/LS-DYNA有限元分析软件,在不考虑装药冲击响应特性的前提下,对卵形弹侵彻混凝土靶板进行数值模拟,重点研究了在2.0Ma~6.0Ma撞击速度下,弹体材料、曲径比、长径比和质量对侵彻性能的影响。结果表明:随着着靶速度的提升,弹体无量纲侵深均呈现先上升后下降的趋势;同时,相比93钨合金和TA7钛合金材料,弹体材料选用G50合金钢侵彻性能更佳;曲径比在低速侵彻时对无量纲侵深影响显著,在超高速侵彻时影响程度降低,弹体最佳曲径比为3~4;长径比在低速侵彻时与侵深呈正相关,在超高速侵彻时呈负相关,无量纲侵深随长径比的增大而减小,弹体最佳长径比为4~5;质量对侵深影响显著,对无量纲侵深和临界转化速度影响较小;临界转化速度出现在3.5Ma~4Ma。

In order to study the penetration power of ogive-nose projectile under the condition of wide velocity range, the ANSYS/LS-DYNA finite element analysis software is used to simulate the penetration of the ogive-nose projectile into concrete target plate without considering the impact response characteristics of its range. The effects of projectile material, caliber radius head, length-diameter ratio and mass on the penetration performance are studied under the impact velocity of 2.0Ma~6.0Ma. The results show that with the increase of the target velocity, the dimensionless penetration depth of the projectile increases first and then decreases. At the same time, compared with 93 tungsten alloy and TA7 titanium alloy, the penetration performance of G50 alloy steel is better. The caliber radius head has a significant effect on the dimensionless penetration depth during low-speed penetration, and the degree of influence is reduced during ultra-high-speed penetrating. The optimal caliber radius head ratio of the projectile is 3~4. The length-diameter ratio is positively correlated with the penetration depth at low speed penetration and negatively correlated with the penetration depth at ultra-high speed penetrating. The dimensionless penetration depth decreases with the increase of the length-diameter ratio, and the optimal length-diameter ratio of the projectile is 4~5. The mass has a significant effect on the depth of penetration, and has little effect on the dimensionless depth of penetration and the critical transformation rate. The critical transformation rate appears at 3.5Ma~4Ma.