线性变壁厚对PELE破碎及扩孔性能影响研究

Research on the Effect of Linear Variable Wall Thickness on the Fragmentation and Crater Growth Performance of PELE

为了解PELE壳体轴向厚度线性变化对其侵彻后破碎、扩孔等性能的影响,利用数值模拟的方法,使用Autodyn软件并结合随机失效和断裂软化算法,从动能相同和速度相同两个角度进行研究。结果表明:变壁厚PELE的破碎和扩孔性能明显优于等壁厚PELE,且随着壁厚变化率的增加,侵彻后壳体破碎形式发生变化,破片形状改变,破片数量增加,有效破片率提高,破片径向速度增大,扩孔能力增强。

The penetrator with enhanced lateral effect(PELE),one of the hotspots worthy of research in recent years,has important application value in military.In order to study the effect of linear variation of the axial thickness of the PELE shell on the fragmentation and crater growth performance after penetration,the numerical simulation method will be used in the research,with combination of Autodyn software and the random failure algorithm and the crack-softening algorithm,from two perspectives of the same kinetic energy and the same velocity.The results show that the fragmentation and crater growth performance of PELE projectile with variable wall thickness is obviously better than that of PELE projectile with equal wall thickness.In addition,with the increase of the thickness varying rate,the form of shell fragmentation changes after penetration and the shape of the fragment changes,the number of fragments increases,the effective fragment percent improves,the radial velocity of fragment increases,and the hole-enlarging capability is enhanced.