地下防护工程抗超高速长杆动能弹的若干问题

Some Problems in Underground Protection Engineering Against Hypervelocity Long-Rod Kinetic Projectiles

针对超高速长杆动能弹侵彻成坑的尺寸相似问题、成坑与地冲击耦合能量问题以及等效爆炸当量计算方法问题,在前期研究的基础上,厘清了侵彻成坑相似规律,建立了地冲击能量与成坑范围关系,得到了地冲击能量效率与弹体动能、长径比及介质特性关系,提出了超高速动能弹地冲击等效接触爆炸当量及安全防护层厚度计算方法。结果表明,超高速动能弹撞击的破坏区体积存在尺度效应,与弹体半径的四次方成正比;其他条件不变时,地冲击能量效率随弹体质量增大而增大,随弹体长径比和密度增大而减小。

Aimed at the cratering similarity of hypervelocity penetration,the relationship between the crater and the coupled ground shock energy,and the calculation method of the equivalent explosive yield,the similarity law of penetration crater is clarified and the formula of the ground shock energy based on crater volume is established.The relationship between the ground shock efficiency and the projectile kinetic energy,the length-diameter ratio of the projectile,and the material characteristics is obtained.The calculation methods for the equivalent yield of the penetration ground shock and the thickness of the safety protective layer are proposed.The results show that there is a scale effect in the volume of the penetration damage zone,which is proportional to the fourth power of the projectile radius,and that when other conditions remain unchanged,the ground shock energy efficiency increases with the increase of projectile mass,and decreases with the increase of projectile length-diameter ratio and density.