弱约束抛撒条件下子弹对靶板扩孔能力研究

为提高在弱约束抛撒条件下子弹的毁伤效果,采用数值模拟与实验相结合的方法对薄壳子弹以不同攻击姿态对金属靶板的扩孔能力进行研究。建立子弹侵彻金属靶板的有限元模型,对不同着角、攻角情况下的穿甲过程进行数值模拟;对子弹各部件过载及装药安定性进行分析,并完成了不同工况下扩孔情况的计算。计算结果与实验结果一致性很好,相对误差小于10%。结果表明,该方法适合于弱约束抛撒条件下子弹对靶板的扩孔能力研究。

Study on Hole-Enlarging Capability for Projectile Penetrating Steel Plate with Weak-Restriction Scattering

In order to improve the damage effect of the projectile under the condition of weak-restriction scattering, the hole-enlarging capability for thin shell projectile penetrating steel plate with different attack angles was researched by the methods of the numerical simulation and the experiment. The finite element model of the projectile penetrating steel plate was established. The attack angles included the impact angle formed with the plate normal and the velocity direction and the cross angle formed with the projectile axis and the velocity direction. The penetration process of the different attack angles was simulated. Based on the analysis for the impact acceleration of the projectile parts and the invariability of the explosive, the size of the enlarging holes with different attack angles was calculated and compared with the experiment results. A good agreement of the simulation and the experiment was obtained, and the relative error was less 10%. The result shows that this method is suitable for studying the hole-enlarging capability for projectile penetrating steel plate with weak-restriction scattering.