为了为引信惯性触发装置设计提供参考,利用LS-DYNA软件对头部不同形状的弹丸以不同着角碰击薄目标过程进行数值仿真研究,得到了头部不同形状的弹丸以不同着角碰击不同薄目标时的最大前冲过载系数。研究表明:弹丸前冲过载系数最大值并不是在正碰靶的情况下,而是对应某一小着角,靶板材质和厚度不同该着角也不同,应考虑弹丸攻角和立靶误差导致的着角变化对引信惯性触发灵敏度和钝感度性能的影响。头部形状不同,弹丸碰靶前冲过载系数差异较大,因此弹头形状设计应综合考虑气动力特性与引信碰靶前冲环境之需。

The use of the LS-DYNA procedure to simulate the projectile of different head shape contacting thin target at different impact angle and obtain the maximum set-forward overload factor provide reference for designation of inertia contact device of fuze. The results show that the maximum set-forward overload factor appears while the projectile contact target is in a small impact angle which changes along with the materials and thickness of the target plate rather than contacting positively, so the impact angle generated by the error of the target plate and attack angle's influence on the contact sensitivity and insensitivity tests must also be considered. Designing different projectile shape, there is great differences in the maximum set-forward overload factor, so while designing projectile shape, the aerodynamic characteristics and the set-forward enviroment must be considered.