Optimization Design of Precursor K-Charge Structure of Tandem Warhead

Aimed at the requirement of large hole diameter and deep penetration depth of tandem warhead 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 parameters 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 results are in good agreement with the experimental results, which provides a reference for the further study of tandem shaped charge technique.