基于层裂机理的弹体侵彻混凝土的终点弹道研究

基于动态球形空腔膨胀理论给出的阻力函数理论公式和开坑阶段的表面层裂机理，建立了能够综合考虑弹头形状、开坑区深度的斜侵彻深度预测模型，并进一步推导了能够适用不同弹头形状的弹体过载时程曲线计算公式。预测模型得到的侵彻深度和过载与试验结果吻合较好。研究结果可为弹体与混凝土靶的斜侵彻弹道分析和弹丸头部设计提供一定帮助。

Theoretical analyses for terminal ballistic of projectiles penetrating into concrete based on splitting mechanism

Based on the theoretical resistance function from dynamic spherical cavity expansion model and the surface splitting mechanism, a prediction model is proposed for obliquely penetration depth of rigid projectiles into concrete targets. In the proposed formula, the dimensionless coefficients denoting the projectile nose geometry are introduced to consider the variation of projectile nose geometry and the cratering depth. A prediction model for the deceleration-time history of the projectile with different nose geometries is obtained. The penetration experiments are carried out subjected to projectiles with different nose shapes by 25mm smoothbore gun. The penetration depths and overload curve of the model are in good agreement with the test results. The research results can provide some help for the oblique penetration trajectory analysis and the design of the projectile head.