摘要
针对杆式爆炸成型侵彻体(Explosively formed penetrator, EFP)的侵彻能力问题,利用数值仿真手段开展杆式EFP侵彻特性研究,分析杆式EFP成型形态、着靶速度及材料特性对其侵彻能力的影响,得到杆式EFP成型特征参数在侵彻过程中的影响规律。研究结果表明:杆式EFP在侵彻过程中,除初始阶段(碰撞后)和最后阶段(杆侵蚀后)外,弹体保持恒定速度运动,满足恒速杆假设;稳定侵彻时,随着密实部长度的逐渐减小,中空尾裙部材料不断流入密实部补充其侵蚀损失。增加弹体长度可以在一定程度上提高EFP的侵彻能力,但归一化侵彻深度下降;提高着靶速度和密实部长度可以显著提升杆式EFP侵彻性能。杆式EFP的强度对侵彻的影响有限,但靶体强度不可忽略,弹靶材料密度是影响侵彻体侵彻的主要因素。
For the penetration efficiency of rod-shaped explosively formed penetrator(EFP),the numerical simulation method is used to study the penetration characteristics of rod-shaped EFP.The influences of forming shape,impact velocity,and material characteristics of rod-shaped EFP on its penetration ability are analyzed,and the influence law of rod-shaped EFP forming characteristic parameters on the penetration process is obtained.The research results indicate that the rod-shaped EFP maintains a constant velocity motion during the penetration process,except for the initial stage(after collision)and the final stage(after rod erosion),satisfying the assumption of a constant velocity rod.When stable penetration occurs,the hollow tail skirt material continuously flows into the dense part to supplement its erosion loss with a gradual decrease in the length of the dense part.The length of the projectile can be increased to improve the penetration ability of EFP to a certain extent,but the normalized penetration depth decreases.The impact velocity and the length of dense part can be Increased to significantly enhance the penetration performance of rod-shaped EFP.The strength of rod-shaped EFP has a limited impact on penetration,but the target strength cannot be ignored.The density of target material is the main factor affecting the penetration of the projectile.
作者
王雅君
郁锐
李伟兵
李文彬
WANG Yajun;YU Rui;LI Weibing;LI Wenbin(National Key Laboratory of Land and Air Based Information Perception and Control,Xi'an Modern Control Technology Research Institute,Xi'an 710065,Shaanxi,China;School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2024年第S01期174-182,共9页
Acta Armamentarii
基金
陕西省自然科学基础研究计划资助项目(2024JC-YBQN-0017)。
关键词
终点效应
爆炸成型侵彻体
侵彻性能
数值仿真
terminal effect
explosively formed penetrator
penetration performance
numerical simulation
