为研究典型缓冲结构和缓冲材料对超高速侵彻战斗部装药防护性能的影响,降低侵彻过程中强过载恶劣环境引发的装药响应,采用LS-DYNA对战斗部以1 400 m/s速度正侵彻混凝土靶进行数值模拟。通过对弹体侵彻过程中无缓冲装药力学响应分析,确定了缓冲结构设计的方向,研究不同材料、厚度的缓冲块和缓冲层对装药环境的影响。结果表明:缓冲块对装药前段保护效果明显,能显著降低装药应力和过载峰值;缓冲层结构则更趋向于提升装药整体应力变化的一致性,使装药整体应力环境变化更加均匀。所选缓冲块结构以30 mm厚聚碳酸酯最优,能使装药过载和应力峰值分别降低20%和34%;缓冲层结构以4 mm厚聚四氟乙烯最优,装药过载和应力峰值分别降低19%和9%。为高速侵彻战斗部装药缓冲结构防护提供一定参考。

To study the influence of typical buffer structures and buffer materials on the protective performance of charge in ultra high speed penetration warheads, and to reduce the charge response caused by strong overload and harsh environment during penetration, numerical simulation of a warhead at a speed of 1 400 m/s penetrating a concrete target using LS-DYNA is carried out. By analyzing the mechanical response of unbuffered charges during projectile penetration, the direction of buffer structure design is determined, and the effects of different materials, thicknesses of buffer blocks and buffer layers on the charging environment are studied. The results show that the buffer block has a significant protective effect on the front section of the charge, and can significantly reduce the stress and overload peak of the charge; The buffer layer structure tends to improve the consistency of the overall stress changes of the charge, making the overall stress environment changes of the charge more uniform. The optimal buffer block structure is 30 mm thick polycarbonate, which can reduce the overload and stress peak of the charge by 20% and 34% respectively; The optimal buffer layer structure is 4 mm thick polytetrafluoroethylene, with a reduction of 19% and 9% in charge overload and stress peak, respectively.