高速及超高速钻地弹侵彻土壤深度及轨迹的研究

为了对地下掩体进行有效打击，钻地弹在现代战争中受到了广泛的重视．但由于地下掩体深度的不断加深，目前常规钻地弹已无法对其构成威胁．目前世界各国对钻地弹的研究主要集中于其侵彻深度，而对其侵彻轨迹的研究还相对较少，而侵彻轨迹对于深钻地弹的有效打击至关重要．因此，本文在分析三维钻地弹形状及受力的基础上运用空腔膨胀理论推导了三维弹体侵彻深度的解析解，同时，基于微分面积力法，运用ABAQUS有限元软件模拟仿真钻地弹侵彻土壤的空腔膨胀理论模型．为了研究钻地弹侵彻土壤的轨迹，本文针对常规高速钻地弹以及运用弹道导弹携带钻地弹头的超高速钻地弹进行研究．研究表明：本模型可以有效给出了弹体攻角、侵彻角以及弹体质心位置对钻地弹侵彻轨迹的影响以及相应条件下钻地弹侵彻土壤时的过载曲线．在对常规高速钻地弹侵彻轨迹的研究中发现：钻地弹的初始攻角可以使得带有同方向侵彻角的弹体侵彻轨迹优化．

The Study of Trajectory and Depth of Hyper and Conventional Velocity of Earth Penetrator

Much attention has been paid to earth penetrators by the world since it could destroy the bunker efficiently. But as bunkers go deeper and deeper, it becomes impossible for the conventional penetrator to destroy. Currently, the world has been focused on the penetration depth of penetrator other than the trajectory. But the trajectory of a deep penetrator plays an extremely important role in destroying the target deep in the earth. So we present a dynamic model of a 3-D hard projectile using CET. The derivation of the depth of the penetrator is given by using the presented dynamic model and together with CET. Differential area force law and CET are used in ABAQUS to formulate the motion of the projectile. For the study of trajectory of penetrator, we use the penetrator carried by ballistic missile and conventional hypervelocity projectile, the proposed model is capable of predicting the trajectory and the overload of the penetrator with different initial biting angle and angle of attack of different location of mass center. On the study of conventional hypervelocity projectile, we found that the angle of attack could optimize the trajectory penetrated by the projectile only with initial biting angle.