弹体在岩石中侵彻与贯穿计算原理

根据岩石抗侵彻过程中变形和破坏状态，提出了岩石的变形与破坏模型。利用波阵面上的动量守恒关系和弹体表面的运动规律，得到了有别于国内外的作用在弹体表面的应力表达式。通过破碎区与径向裂缝区的能量传输关系，得到了侵彻与贯穿问题中的比例换算关系，从而推出了具有工程尺度的侵彻计算公式和具有物理基础的贯穿过程。通过与国内外现有的经验公式计算结果对比分析，验证了本公式的可靠性。

CALCULATION PRINCIPLE FOR PENETRATION AND PERFORATION OF PROJECTILES INTO ROCK

The deformation and failure models of rock are presented according to the characteristics of local deformation and failure of rock. The formula of stress on the projectile is obtained from relation of momentum conservation on the wavefront and continuum condition of the surface of projectile. The results are different from the existing formulae both in China and abroad. The scale relation of penetration and perforation is clarified by the relation of energy transfer in the process of fragmentation zone to radial crack zone. A generalized formula for the penetration depth and the perforation process on a sound physical background are obtained from the non-deformable projectile with conical nose. By comparison with current empirical equations, the proposed formula is validated.