串联战斗部前级K装药结构的优化设计

Optimization Design of Precursor K-Charge Structure of Tandem Warhead

针对串联战斗部前级装药大开孔兼顾侵深的要求，应用LS—DYNA有限元软件，结合正交优化设计方法，仿真研究了K装药的药型罩及隔板结构参数对高速聚能杆式射流成型的影响规律，找出了形成较高头部速度的聚能杆式射流的药型罩外壁曲率半径和偏心距（分别为90-110mm和35～40mm）。计算得到了各结构参数（偏心距、罩外壁曲率半径、壁厚、隔板直径、张角、锥角）对聚能杆式侵彻体成型指标（头部速度和头尾速度差）影响的主次顺序，获得了K装药结构参数的最佳组合。进行了X光成像及侵彻钢靶实验，侵深达到装药口径的3．73倍，侵彻孔径为装药口径的0．36倍，侵彻孔径较均匀。数值模拟结果与实验结果吻合较好，研究结果为串联聚能装药技术的进一步研究提供了参考依据。

Aimed at the requirement of large hole diameter and deep penetration depth of tandem war-head precursor charge, by using LS-DYNA finite element software and orthogonal optimal design method,the influence law of the liner and foam structural parameters of K-charge on the formation of the shaped jet was studied. The relatively high tip velocity was gained,when the liner curvature radius was selected within a range between 90 and 110 mm, and the eccentricity was taken between 35 and 40 mm. The influence sequence of the structural parameters, including eccentricity, curvature radius, thickness, foam diameter,opening angle, and cone angle, on the jet formation indexes （tip velocity, tip and tail velocity difference） was obtained, and the optimal combination of K-charge structural parame-ters was acquired. The X-ray imaging and steel penetration experiments were also carried out. The experimental results show that the penetration depth and hole diameter reach 3.73 and 0.36 times of charge diameter, respectively, and the penetration hole is relatively homogenous. The simulation re-sults are in good agreement with the experimental results, which provides a reference for the further study of tandem shaped charge technique.