弹体侵彻刚玉块石混凝土复合靶体的数值分析

在先前混凝土三维细观模型和块石遮弹层三维模型研究的基础上，研究了小直径炸弹侵彻条件下，刚玉块石遮弹层的抗侵彻性能。重点分析了弹体侵彻条件对侵彻深度和弹体偏转角度的影响以及遮弹层构造参数对侵彻结果的影响；详细探讨了弹体命中速度、命中角度和弹着点位置，以及刚玉块石大小、体积率和填充混凝土强度对遮弹层抗侵彻性能的影响。与普通块石遮弹层相比，刚玉块石混凝土复合遮弹层具有更好的抗弹体侵彻性能。

Numerical analysis of the projectile penetration into the target of corundum-rubble concrete composite overlay

In order to investigate the performances of corundum-rubble overlays subjected to small-diameter bomb penetration, a three-dimensional finite element model is developed. The model is used to study the projectile penetration into the corundum-rubble overlay by taking into account the randomness of corundum-rubble in size, shape and spatial distribution. This paper focuses on the following two aspects. The first is the effects of penetration conditions (such as projectile velocity, impact angle and position) on penetration depth and terminal yawing angle. The second is the influences of the constituted parameters for the corundum-rubble overlay (such as size and volume fraction of corundum-rubble, strength of grouted concrete). The numerical results are compared with the data from rock-rubble overlay, and better performances are found for the corundum-rubble overlay subjected to projectile penetration.