基于数值模拟的蜂窝钢管约束混凝土靶抗侵彻机理  

Anti-penetration Mechanisms of Cellular Steel-tube-confined Concrete Target Based on Numerical Simulation

作　　者：宋殿义[1] 蒙朝美 谭清华 SONG Dianyi;MENG Chaomei;TAN Qinghua(Undergraduate School,National University of Defense Technology,Changsha 410072,China;Unit 95979 of PLA,Taian,271207,China;School of Civil Engineering and Architecture,Guangxi University,Nanning,530004,China)

机构地区：[1]国防科技大学军事基础教育学院,湖南长沙410072 [2]中国人民解放军95979部队,山东泰安271207 [3]广西大学土木建筑工程学院,广西南宁530004

出　　处：《弹道学报》2024年第3期82-90,共9页Journal of Ballistics

基　　金：湖南省自然科学基金项目(2021JJ30776)。

摘　　要：多孔蜂窝钢管约束混凝土靶具有良好的抗侵彻性能和拓展性能。基于ANSYS/LS-DYNA软件,采用FEM/CSCM-SPH/HJC耦合法,模拟了多孔蜂窝钢管约束混凝土靶抗硬芯枪弹侵彻过程,研究了蜂窝钢管约束混凝土靶的抗侵彻机理。结果表明:与单孔正六边形钢管约束混凝土靶和无约束混凝土靶相对比,蜂窝钢管约束混凝土优异的抗侵彻性能主要体现在隧道侵彻阶段,表现为限制弹丸头部附近混凝土的径向膨胀,增大侵彻阻力;对比单孔正六边形钢管约束混凝土靶,蜂窝钢管约束混凝土靶周边单元为钢管提供了支撑,限制了钢管壁的面外弯曲变形,强化了钢管的约束效应,即形成周边单元的附加约束作用;对比无约束混凝土靶,钢管的存在限制了蜂窝钢管约束混凝土靶被打击单元的径向膨胀,强化了被打击单元混凝土的围压效应,提高了混凝土的强度和变形性能,增大了弹丸的侵彻阻力,从而使其抗侵彻能力提高。因此,蜂窝钢管约束混凝土靶由于蜂窝钢管的侧向约束和周边单元的附加约束双重约束效应而体现出良好的抗侵彻性能。Cellular steel-tube-confined concrete(STCC)target has excellent anti-penetration ability and expandable performance.Based on finite analysis software ANSYS/LS-DYNA,the penetration process and anti-penetration mechanism of cellular STCC target normally penetrated by rigid projectiles were numerically simulated by using FEM/CSCM-SPH/HJC method.Compared with single-cell STCC targets and non-confined concrete target,the confinement effect of cellular steel-tube mainly reflects at the tunneling penetration stage and shows lateral confinement expansion of concrete at nose of projectiles.Compared with single-cell STCC target,surrounding cells of seven-cell cellular STCC target exert supporting on the steel tube in the impacted-cell.It restrains radial expansion of impacted concrete and bending deformation of steel tube,which can be treated as supplementary confinement of the surrounding cells.Compared with non-confined concrete target,it is the confinement of steel tube that improves the confining effect of concrete in the impacted cell,which enhances compressive strength and deformation performance of concrete in the impacted cell,and the penetration ability of the impacted cell is improved.Therefore,owing to confinement of the steel tube and supplementary confinement of the surrounding cells,the cellular STCC target exhibits excellent anti-penetration ability.

关 键 词：防护结构 蜂窝钢管约束混凝土 侵彻机理 约束效应 数值模拟 

分 类 号：TJ385[兵器科学与技术—火炮、自动武器与弹药工程]