侵彻自锐非连续穿甲弹芯性能的数值模拟分析OA
Numerical Simulation Analysis on Performance of Discontinuous Armor-Piercing Projectile Core with Self-Sharpening Penetration
针对高速弹靶作用下硬质金属脆断及弹塑性材料泰勒杆效应导致穿甲弹侵彻性能下降的问题,采用一维应力波反射与透射理论,设计了一种将连续弹芯转变为非连续弹芯的多界面穿甲弹芯结构(弹芯头部由钨锥和铝锥交替组成).首先,通过理论计算证明经钨-铝-钨界面后弹靶碰撞产生的界面应力波强度降至初始值的51.3%;然后,运用Lsdyna软件开展有限元仿真,对比研究了非连续穿甲弹芯与连续穿甲弹芯在侵彻陶瓷钢复合装甲过程中的应力波传播、动能及速度变化;最后,利用正交分析法研究了非连续穿甲弹芯头部锥角、头部锥厚度及各锥间厚度比例对穿靶残余动能的影响.研究结果表明,非连续穿甲弹芯在侵彻时应力集中于头部钨锥,其他部位应力强度很低,弹芯头部在弹靶过程中能保持尖锐,侵彻性能显著提升.其动能和速度全程高于连续穿甲弹芯,侵彻后残余动能和残余速度分别高出48.2%和11.9%;非连续穿甲弹芯各结构参数对穿靶残余动能的影响程度排序为头部锥角>头部锥厚度>各锥间厚度比例.本文研究结果可为提高穿甲弹芯侵彻性能的工程设计提供理论参考依据.
Aiming at the problems of brittle fracture of hard metals under the action of high-speed projec-tiles and the decline in the penetration performance of armor-piercing projectiles caused by the Taylor rod effect of elastoplastic materials,a multi-interface armor-piercing projectile core structure that transformed continuous cores into discontinuous cores was designed based on the one-dimensional stress wave reflec-tion and transmission theory(the core head is alternately composed of tungsten cones and aluminum cones).Firstly,it was verified through theoretical calculation that the stress intensity after passing through the tungsten-aluminum and aluminum-tungsten interfaces of the stress wave decreased to 51.3%of the initial value.Secondly,the finite element simulation was carried out using Lsdyna software to com-paratively study the stress propagation,kinetic energy and velocity changes of discontinuous armor-piercing cores and continuous armor-piercing cores during the penetration of ceramic-steel composite armor.Finally,the orthogonal analysis method was utilized to study the influence of the cone Angle at the head of the discontinuous armor-piercing core,the thickness of the cone at the head,and the thickness ratio between each cone on the residual kinetic energy of target penetration.The research results show that the stress of the discontinuous armor-piercing core is concentrated in the tungsten cone at the head during pen-etration,while the stress intensity in other parts is relatively low.The head of the core can remain sharp during the target firing process,and the penetration performance is significantly improved.Its kinetic energy and velocity are higher than those of the continuous armor-piercing core throughout the process.After pen-etration,the residual kinetic energy and residual velocity are 48.2%and 11.9%higher,respectively.The order of the influence degree of each structural parameter of the discontinuous armor-piercing core on the residual kinetic energy of penetrating the target is the cone angle of the head>the thickness of the cone of the head>the thickness ratio between each cone.The results can provide theoretical reference for engineer-ing design of improving penetration performance of armor-piercing projectile core.
闫帅宇;张会锁;李昌怡
中北大学 机电工程学院,山西 太原 030051中北大学 机电工程学院,山西 太原 030051中北大学 机电工程学院,山西 太原 030051
军事科技
非连续穿甲弹芯结构自锐金属脆断应力波
discontinuous armor-piercing projectile corestructural self-sharpeningmetal brittle fracture propertystress wave
《中北大学学报（自然科学版）》 2026 (1)
8-17,10
评论