不同弹头夹心弹斜侵彻金属靶特性
Characteristics of Oblique Penetration of Metal Targets by Jacketed Rods with Different Noses
侯云锟 1唐奎 1王金相 1顾敏辉 1郝戌龙 1王积锐1
作者信息
- 1. 南京理工大学 瞬态物理全国重点实验室,江苏 南京 210094
- 折叠
摘要
为研究不同弹头形状对夹心弹斜侵彻金属靶的影响,开展 3 种不同弹头形状夹心弹斜45°侵彻4340 钢靶的试验,并结合数值仿真对夹心弹与钨合金射弹进行对比,对3 种夹心弹的侵彻过程及其侵彻特性进行分析.研究结果表明:在相同动能斜侵彻的情况下,夹心弹的侵彻性能优于均质钨合金射弹,但由于夹心弹外套与弹芯之间较大的阻力差距,使夹心弹的弹道偏转更严重;当夹心弹以约1 450 m/s速度侵彻斜 45°的 4340 钢靶时,半球形弹头夹心弹斜侵彻的弹道稳定性最好,而截锥形弹头夹心弹的弹道偏转最大;斜侵彻过程可分为头部镦粗偏转、稳定斜侵彻、侵彻终止3 个阶段,夹心弹侵彻弹道偏转主要表现在头部镦粗偏转阶段之后;弹头形状对夹心弹弹道偏转影响的根本因素是开坑阶段夹心弹弹头所受侧向力大小与弹坑形态;截锥形弹头夹心弹在头部镦粗偏转阶段所受合阻力方向与夹心弹轴向夹角最大,偏转力矩最大,弹头发生的弯曲变形最大,同时初始弹坑下,侧面与弹头斜锥面几乎平行,进而导致其侵彻弹道偏转最大;半球形弹头夹心弹在开坑阶段受到的偏转力矩最小,具有更好的侵彻弹道稳定性;不同的侵彻角度下,截锥形弹头夹心弹的弹道偏转受侵彻角度变化影响最大,半球形弹头夹心弹受侵彻角度影响程度最小,其斜侵彻弹道稳定性最好.
Abstract
In order to investigate the influence of different nose shapes on the oblique penetration of jacketed rods into the metal targets,the experiments are conducted for three types of jacketed rods with varying shapes obliquely penetrating 4340 steel targets at 45°.The jacketed rods and tungsten alloy projectiles are compared through numerical simulation,and the penetration processes and characteristics of the three kinds of jacketed rods are analyzed.The results indicate that,compared to homogeneous tungsten alloy projectiles,the jacketed rods exhibite superior penetration performance under the same kinetic energy oblique penetration conditions.However,the significant resistance difference between the jacket and the core of the jacketed rod results in more severe trajectory deviation.When the jacketed rods obliquely penetrate into 4340 steel targets at 45° at about 1450 m/s,the jacketed rod with hemispherical nose demonstrates superior trajectory stability,while the jacketed rod with truncated cone nose exhibites the most significant trajectory deviation.The oblique penetration process can be delineated into three phases:head coarsening deviation,stable oblique penetration,and penetration termination.The trajectory deviations of the jacketed rods mainly occur after the head coarsening deviation stage.The fundamental factors influencing the trajectory deviations of the jacketed rods are the lateral force acting on the rod nose at the penetration hole-opening stage and the morphology of the penetration hole.The angle between the direction of the combined resistance force experienced by the jacketed rod truncated cone nose with at the head coarsening deviation stage and the axial direction of jacketed rod is maximized,resulting in the largest deflection torque and maximum bending deformation of the nose.Additionally,the lower side of the initial penetration hole is nearly parallel to the inclined cone surface of the nose,leading to the maximum trajectory deviation.On the other hand,the jacketed rod with hemispherical nose experiences the smallest deflection torque at the penetration hole-opening stage,thus it possesses better stability in the penetration.At different impact angles,the trajectory deviation of jacketed rods with truncated cone nose is most affected by the changes in the impact angle,while the jacketed rods with hemispherical nose are least affected,exhibiting the best trajectory stability during oblique penetration.
关键词
夹心弹/斜侵彻/弹头形状/金属靶Key words
jacketed rod/oblique penetration/nose shape/metal target引用本文复制引用
出版年
2025
NETL
NSTL
万方数据