静动爆冲击波数值仿真分析

Numerical Simulation Analysis of Static and Dynamic Shock Waves

研究采用AUTODYN对静爆、动爆过程进行了数值仿真,分析了TNT当量为9.53 kg,装药运动速度为0 m/s,421 m/s,675 m/s,1020 m/s的球形裸装药在无限空气域中爆炸情况。定量研究了不同装药运动速度下冲击波演化云图、冲击波压力峰值衰减曲面及冲击波压力峰值相对变化率曲面。研究结果表明:静爆冲击波压力以球形的方式均匀的向外演化;动爆冲击波在压力上升区域内,随装药运动速度的增大而增大,在下降区域内,冲击波压力随装药运动速度的增大而减小,并且动爆冲击波压力随时间的衰减速率要比静爆冲击波压力随时间的衰减速率快。同时,通过对比仿真数据分析可知,动爆冲击波压力峰值最大值出现在与装药运动速度正向成30°夹角区域内。

AUTODYN was used to simulate the static explosion and dynamic explosion process.The TNT equivalent was 9.53 kg,and the spherical bare charge with a charging speed of 0 m/s,421 m/s,675 m/s,and 1020 m/s exploded in an infinite air field.The shock wave evolution cloud map,the shock wave pressure peak attenuation surface,and the shock wave pressure peak relative change rate surface were quantitatively studied.The results show that the static shock wave pressure is uniformly outwardly evolved in the form of spheres;while the dynamic shock wave increases in the pressure rising region with the increase of the charging movement speed,in the falling region,the shock wave pressure increases with the charging motion.The speed increases and decreases,and the dynamic shock wave pressure decays faster with time than the static shock wave pressure decays with time.And by analyzing a plurality of simulation data,the maximum value of the peak value of the dynamic shock wave was obtained in a region 30°from the positive direction of the charging motion speed.