摘要
采用 AUTODYN-2D 无网格 SPH 数值技术,对遭遇速度为(2～11)km/s 条件下球形铝弹丸正碰撞Whipple 防护结构的弹道极限(临界弹丸直径)进行了数值模拟。结果表明,数值模拟结果与实验值相当吻合,且弹道极限随碰撞速度增大呈现为三种不同的变化趋势。当碰撞速度 V≤3km/s 或 V≥7km/s 时,临界弹丸直径随碰撞速度增大而减小;当3km/s<V<7km/s 时,临界弹丸直径随碰撞速度增大而增大。
Using the gridless smooth particle hydrodynamie(SPH)numerical technique of AUTODYN-2D hydrocode,the Ballistic limit(i.e.,projectile critical diameter)of Whipple shield for normal impact of spherical aluminum projectile at velocities ranging from (2 to 11)km/s are simulated.The results show that the ballistic limits varying with the impact velocities indicate three different trends,and simulations have a good agree with experiments.The critical projectile di- ameter increases with impact velocities≤3km/s or ≥7km/s,and decreases with impact velocities at 3km/s～7km/s.
出处
《弹箭与制导学报》
CSCD
北大核心
2005年第SD期915-918,共4页
Journal of Projectiles,Rockets,Missiles and Guidance
