摘要
预测三波点的位置以及三波点的变化规律,对于准确评估大当量炸药或战斗部的威力有着重大的意义.本文基于AUTODYN有限元分析软件,利用数值模拟的方法对爆炸场中的三波点轨迹进行了研究,经初步分析表明,在爆炸场中,爆炸冲击波总是以炸药为中心向周围扩散,三波点高度轨迹均保持不断升高的趋势.在中场时(爆心距4 m~7 m)无论改变TNT的当量、爆炸高度还是起爆点位置,三波点高度的增速都较为缓慢,而在远场时(爆心距>7 m)增速相对较快.当炸药爆炸高度不变时,改变炸药当量,当量越小,在同一测点处的三波点越高.当炸药当量不变时,改变爆炸高度,爆炸高度越小,在同一测点处的三波点越高.在中场时起爆点位置的改变对于三波点轨迹的影响不大,在远场时起爆点位置越高,则三波点轨迹的增速越快.
Predicting the location and the changing regularity of triple point has great significance for accurately assessing the power of high-yield explosives or warheads.Based on the finite element analysis software of AUTODYN,the triple point trajectory in the explosion field is studied by numerical simulation,and preliminary analysis shows that the explosion shock wave,in the blast field,always spreads around the explosive.At the same time the height trajectories of triple point keep an increasing trend.Compared with the fast growth in the far field(the distance between blasting centers is more than 7 m),the increasing rate of triple point height is relatively slow in midfield(the distance between blasting centers is between 4 m and 7 m),regardless of changing TNT equivalent,explosion height or initiation point position.When the explosive height remains constant,the less equivalent,the higher triple point at the same measuring point.And when explosive equivalent remains constant,the less explosion height,the higher triple point at the same measuring point.In the far field,the higher detonation point position,the faster increasing rate of triple point.But the change of the initiating point position has little effect on the triple point trajectory in the mid field.
作者
唐亦康
孔德仁
TANG Yikang;KONG Deren(School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
出处
《测试技术学报》
2021年第4期352-357,共6页
Journal of Test and Measurement Technology
关键词
三波点
TNT炸药
当量
爆炸点位置
爆炸高度
triple point
TNT explosine
equivalent
the location of detonation point
burst height
