弹体长径比影响钢筋混凝土侵彻规律的数值研究  

Ressearch on Projectile's Ratio of Length to Diameter Influencing Penetration of Steel Reinforced Concrete by Numerical Simulation

作　　者：万文乾[1] 龙源[1] 岳小兵[1] 纪冲[1] 

机构地区：[1]解放军理工大学工程兵工程学院,南京210007

出　　处：《弹箭与制导学报》2005年第2期53-55,共3页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：北京理工大学爆炸灾害预防;控制国家重点实验室开放基金;项目编号:KFJJ03-5

摘　　要：利用有限元软件ANSYS/LS-DYNA对相同初始条件下(初始位置相同,初始速度和实始动能相同),对长径比分别为1.5、2.5、4、5四种弹体侵彻钢筋混凝土靶板进行了数值分析。研究表明,弹体速度在两层钢筋网附近时下降很快,弹体长径比在这两个阶段对速度变化影响很大。弹体长径比为5时,剩余速度增量已经很小,再增大长径比对侵彻速度变化影响很小。By the numerical simulation in ANSYS/LSDYNA, we tried to research on the projectile's ratio of length to diameter influence upon penetration of steel reinforced concrete under the same initial conditions, including the same initial position, the same initial velocity and the same initial kinetic energy. Analyzed the penetrating process, the projectile's velocity decreased fast at two stages when the projectile was piercing the region near rebar net. At the same time, the ratio of length to diameter has greater influence on the velocity at these two stages. When the ratio of length to diameter is 5, the increase of remain velocity of the projectile is very little. Thus increase the ratio of length to length to diameter has little influence on the penetration.

关 键 词：混凝土侵彻 ANSYS/LS-DYNA 数值研究 速度变化 有限元软件 混凝土靶板 初始位置 初始条件 初始速度 数值分析 弹体侵彻 速度增量 大长径比 钢筋网 动能 

分 类 号：O385[理学—流体力学] TQ02[理学—力学]