X100管线钢管对7.62 mm穿甲弹抗侵彻性能的数值预报  

NUMERICAL PREDICTION ON THE BALLISTIC RESISTANCE OF X100 PIPELINE STEEL PIPES AGAINST 7.62 MM ARMOR PIERCING PROJECTILES IMPACT

作　　者：王要沛 肖新科[2] 孙祥 WANG Yao-pei;XIAO Xin-ke;SUN Xiang(School of Civil Engineering,Nanyang Institute of Technology,Nanyang 473004,China;School of Software,Nanyang Institute of Technology,Nanyang 473004,China)

机构地区：[1]南阳理工学院土木工程学院,河南南阳473004 [2]南阳理工学院软件学院,河南南阳473004

出　　处：《南阳理工学院学报》2019年第6期62-67,共6页Journal of Nanyang Institute of Technology

基　　金：国家自然科学基金(11072072);河南省科技攻关项目(182102410058)。

摘　　要：由于局部恐怖袭击的威胁,油气管道对极端冲击载荷的防护备受关注。采用有限元计算的方法,在ABAQUS中建立直径1219 mm,壁厚14.8 mm的X100管线钢管对于7.62 mm穿甲弹钢芯弹垂直正撞击的计算模型,对其抗侵彻性能和失效机理进行研究。计算中初始撞击速度介于600~1000 m/s,X100钢的力学行为通过Johnson-Cook本构模型和断裂准则表征。获得了不同撞击速度下子弹的剩余速度和管线钢管的失效机理,并拟合得到了弹道极限。计算结果显示:钢管的失效模式为延性扩孔;弹道极限为685.7 m/s。其弹道极限小于步枪子弹的发射速度,应采用额外措施以提升该管道对于局部撞击的防护性能。Due to the threat of localized terrorist attacks,the protection of oil and gas pipelines against extreme impact loads is of great concern.By using the finite element method,the calculation model of a X100 pipeline steel pipe with a diameter of 1219 mm and a wall thickness of 14.8 mm under normal impact of the steel core of the 7.62 armor piercing(AP)projectile was established in ABAQUS,and the ballistic resistance and failure mechanism were studied.In the calculation,the initial impact velocity was between 600 m/s and 1000 m/s,and the mechanical behavior of X100 steel is characterized by the Johnson-Cook constitutive model and Johnson-Cook fracture criterion.The residual velocity of the bullet and the failure mechanism of the pipe at different impact velocities were extracted from the simulations,and the ballistic limit was obtained by fitting the initial-residual velocity data.The results showed that the failure mode of steel pipe is ductile hole enlargement and the ballistic limit is 685.7 m/s.The ballistic limit is less than the firing speed of a rifle bullet and thus additional efforts should be taken to improve the pipe’s protection against local impact.

关 键 词：X100管线钢 弹道极限 破坏机理 有限元计算 

分 类 号：O385[理学—流体力学] TJ012.4[理学—力学]