为了提高聚能战斗部对水中目标的毁伤威力，提出形成串联爆炸成型弹丸(Explosively Formed Projectile，EFP)的组合药型罩战斗部结构。利用平板抛掷和圆筒压垮公式建立组合药型罩EFP速度分析模型，并使用AUTODYN-2 D软件对EFP成型和入水毁伤过程进行数值模拟，研究组合药型罩结构参数对串联EFP成型的影响，证明其在水中高效的侵彻性能。研究结果表明:理论与数值模拟计算得到的EFP速度基本吻合，最大误差不超过10％;组合药型罩分离形成串联EFP是由于内外罩不同的材料和结构组合使罩微元从接触面处开始形成较大的速度差所引起的;随着内罩直径的增大，内外罩形成的EFP速度同时减小，长径比分别增大与减小;单独增大内外罩外曲率半径与罩顶壁厚，对应罩成型的EFP性能变化规律和单一药型罩相同，但另一罩成型EFP的长径比均减小或分别减小与增大，速度变化幅度较小;组合药型罩串联EFP侵彻4倍装药直径的水后，动能衰减率较双层药型罩降低21。55％，剩余速度提高5。77％，且随着侵彻距离的增加该差距进一步扩大。
The Structural Parameters of Combined Liner for Tandem Explosively Formed Projectile
In order to improve the destructive power of shaped charge warhead to underwater targets,a combined liner warhead structure was proposed to form a tandem Explosively Formed Projectile ( EFP) . The velocity model of combined liner EFP was established by the formulas of plate driving and cylinder collapsing,the EFP molding and damage in water were simulated by AUTODYN-2D to study the influence of structural parameters of combined liner on tandem EFP molding and prove its efficient damage performance in water. The results show that the theoretical and simulated EFP speeds are basically consistent with the maximum error of less than 10％. The separation of the combined liner to form tandem EFP is caused by the large velocity difference between the liner elements from the interface due to the different material and structure combination of the inner liner and the outer liner. With the increase of the inner liner diameter,EFP velocity of the inner and outer liners decreases simultaneously,and aspect ratio of inner and outer EFP increases and decreases respectively;as the outer curvature radius and the top wall thickness of the inner or outer liner are increased separately,the performance of EFP molded by the current inner or outer liner is the same as that of the single liner,but the aspect ratio of EFP molded by the another outer liner decreases,while the aspect ratio of EFP molded by the another inner liner decreases or increases,and the change in the velocity of another EFP is small. After the tandem EFP of combined liner penetrates water with a diameter of 4 times the charge diameter,the kinetic energy decay rate and the residual velocity of combined liner EFP are reduced by 21.55％ and increased by 5.77％ compared to the double-layer liner,respectively,and the gap of kinetic energy decay rate and residual velocity further expands with the increase of penetration distance.
combined linertandem explosively formed projectileforming regulationunderwater damagenumerical simulation
万方数据
维普
