不同形状弹丸超高速碰撞靶板成坑特性研究  

Numerical Simulation of Projectile Shape Effects on Craters by Hypervelocity Impact on Thick Target

作　　者：张东江[1] 张庆明[1] 巨圆圆[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081

出　　处：《爆破》2013年第4期36-40,65,共6页Blasting

基　　金：国家自然科学基金资助项目(11032003)

摘　　要：采用数值模拟方法研究不同形状弹丸超高速撞击半无限厚靶的成坑特性。研究表明:长径比相等的柱形弹丸或者球形弹丸,在靶板中形成的弹坑趋于半球形,长径比较大的弹丸在靶板中形成坑径比较大的弹坑;相同质量情况下,柱形弹丸比球形弹丸的侵彻能力强,长径比较大的柱形弹丸比长径比较小的柱形弹丸侵彻能力强;长径比较大的柱形弹丸侵彻过程中,弹丸中形成驻定波阵面,呈现出"分节"与靶板作用的现象,侵彻时间延长,侵彻深度增大。The numerical simulation of projectile shape effects on craters in hypervelocity impact on thick aluminum target was investigated.The research shows that the cylindrical or spherical projectile with same ratio of length to diameter was apt to form the hemispherical crater in the target board,while the projectile with larger ratio of length to diameter formed larger crater; on the case of stame quantity,the penetration ability of cylindrical projectile was larger than the spherical projectile,and the cylindrical projectile with larger ratio of length to diameter held larger penetration ability than the relatively small ratio of length to diameter; during the penetration process of cylindrical projectile with larger ratio length to diameter,the projectile formed the standing wave front,and showing a＂ section＂ phenomenon; the penetration depth increases with penetration time extension.

关 键 词：超高速碰撞 数值模拟 弹丸形状 成坑 

分 类 号：O383[理学—流体力学]