大着速范围长杆弹侵彻深度变化及其影响因素的数值模拟  

Depth of Penetration and Its Influence Factors of Long Rod Projectile Impacting on Semi Infinite Target with Elevated Velocity

作　　者：徐晨阳 张先锋[1] 刘闯[1] 邓佳杰[1] 郑应民[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《高压物理学报》2018年第2期114-122,共9页Chinese Journal of High Pressure Physics

基　　金：中共中央组织部青年拔尖人才支持计划(2014);中央高校基本科研业务专项基金(30917011104;30916011305);国家自然科学基金委员会与中国工程物理研究院联合基金(U1730101)

摘　　要：高速/超高速侵彻问题一直是武器设计者和防护工程专家关注的焦点问题之一。随着撞击速度的提高,弹体可能进入流体侵彻阶段,侵彻深度不再随速度的增大单调上升。针对撞击速度增加侵彻深度可能出现增量逆转的现象,开展了大着速范围长杆弹侵彻深度变化的数值模拟研究,分析了弹体硬度、头部形状、弹体材料及靶体材料对侵彻转变点的影响。结果表明:随着长杆弹冲击速度的提升,侵彻深度先上升后下降;同时,弹体硬度提高,到达侵彻转变点对应的撞击速度提高;尖卵形头部弹体到达侵彻转变点的撞击速度比球形头部弹体高;此外,弹靶材料对侵彻深度转变也有较大的影响。Hypervelocity penetration is an important issue for a weapon designer and protection engineering experts.With the increase of the impact velocity,aprojectile may transition into a fluid penetration phase,and its depth of penetration（DOP）no longer rises monotonously with the velocity.Numerical simulation of the penetration processes of a long rod projectile at an elevated impact velocity was performed to analyze the variation and influencing factors of the transition point.Influences of the hardness,nose shape,material of the projectile and the target on the transition point of DOP were simulated.The simulation results show that,with the increase of the impact velocity,the DOP increases at first and then decreases at a certain velocity（called the transition velocity）.The velocity of the transition point improves with the increase of the projectile’s hardness.The Ogive-headed projectile has a higher transition point than the spherical-headed projectile.Moreover,the projectile/target material also has significant effects on the transition point.

关 键 词：超高速侵彻 长杆弹 侵彻深度 转变点 

分 类 号：O385[理学—流体力学]