长杆弹侵彻半无限靶板流体动力学理论

 针对长杆弹垂直侵彻半无限金属靶板,基于侵彻流体动力学理论,研究结果和理论分析成果,从最简单的Bernoulli 方程出发,逐步推导、分析和讨论长杆弹垂直侵彻半无限金属靶板的相关理论。根据实验观察结果结合理论分析、数值仿真讨论了HTP模型的内涵、适用范围和局限性,给出了HTP 模型的基本假设;考虑靶板强度的影响,进而分析AR 模型的相关应用与内涵,并在此基础上讨论了弹体强度的影响,提出了改进的AR 模型,该模型是AR 模型向AT 模型过渡的一个模型,并讨论了该模型的适用性;结合数值研究和现有实验结果,分析了侵彻过程中弹体的速度特征,最后,分析了AT 模型的推导过程、内涵以及相关应用。HTP 模型是建立在9 个基本假设的前提下成立的,本文主要针对后两个假设,逐步释放其限制,从而逐步接近实际情况。

Hydro-dynamics theory for long-rod projectile penetrating semi-infinite target: reviews and studies

Taking the behavior of long-rod projectile vertically penetrating semi-infinite metal target as the subject, this paper deduces and reviews a series of modified penetration theories based on the hydro-dynamic theory of penetration (HTP). A large quantity of published experimental data and numerical simulation results are employed for discussion of the theoretical analysis results. The assumptions and premises for the establishment of HTP model are presented. Based on these experimental data, the numerical results and theoretical analysis results, the connotation, scope of application and limitation of HTP model are discussed. The nine application preconditions for the HTP model are proposed. If the strength of the target is taken into account, the Allen-Rogers model is available. On the basis of analysis of the Allen-Rogers model and considering the strength of the projectile, this paper developed a modified Allen-Rogers model, provided solutions for it and made comparative analysis. In view of the deceleration of the projectile in the process of penetration, the numerical simulation of the penetration was conducted. The derivation and evolution of the theoretical model from the modified Allen-Rogers model to Alekseevskii-Tate model are discussed.