异型截面弹芯垂直侵彻半无限靶板

为研究非圆截面长杆弹的侵彻特性，对长径比为20的圆形、三角形、正方形截面的三种长杆弹对半无限靶的垂直侵彻进行数值模拟，通过已有的实验结果对仿真结果进行验证，并利用数值模拟拓展研究长径比为5、10、15的3种截面形状的长杆弹以及长径比为20的正五边形和正六边形对靶板的侵彻威力，结果表明:异型截面弹在大长径比、高着靶速度条件下具有更优的侵彻威力，其中正三角形截面弹在几种正多边形截面弹中侵彻威力更优；提出弹芯的截面形状因子H，并基于销蚀长杆侵彻模型Alekseevskii-Tate模型，建立了异型截面弹对半无限靶侵彻深度的计算公式. 

Non-Circular Penetrator Normal Impact Semi-Infinite Target

To study the penetration characteristics of non-circular penetrators, simulations and analyses of penetration into semi-infinite targets were done on penetrators whose cross-sections were circular, equilateral triangular, and square. Simulation results were verified with the previous experimental data. Simulations were done to study the penetration power of three kinds of penetrators with different cross section shapes and length-diameter ratios of 5, 10 and 15 and two kinds of penetrators with Regular pentagon and Hexagon cross-sections. Results show that non-circular penetrators with bigger length-diameter ratios and higher impacting velocity had good penetration power; the penetrator with an equilateral triangular cross section had the greatest power. A parameter to name the cross section shape factor was put forward. Based on the Alekseevskii-Tate model, an empirical formulae for the impact of non-circular penetrator on semi-infinite targets was built.