非接触爆炸冲击载荷对防盗门作用数值模拟研究

Numerical simulation for a burglary-resistant door subjcted to non-contact explosion loading

为实现反恐行动中非接触爆炸冲击波破门目标,针对金属防盗门实际条件建立数值仿真模型,重点研究防盗门在非接触爆炸冲击载荷作用下塑性变形破坏过程及规律。结果表明:相同爆炸冲击载荷作用下,实际转动条件防盗门板塑性变形动力响应时间延长,最大变形量远大于四边固支条件下门板变形量;爆炸中心与防盗门距离过近,门板受爆炸产物及空气冲击波共同作用仅局部破坏,不能实现门板整体塑性变形;拟合防盗门板在非接触爆炸冲击载荷作用下变形量计算式,可为反恐破门弹药设计提供依据。

According to actual conditions,a simulation model of a burglary-resistant door subjcted to non-contact explosions was established,and the plastic deformation process and law of the door under loading of non-contact explosion and air-blast wave were studied.The results indicated that under the same loading of non-contact explosion,the plastic deformation response of the burglary-resistant door under rotary boundary conditions becomes longer than that of the door with four edges clamped;and the maximum plastic deformation is much larger than that of the door with four edges clamped;the door is partly damaged due to air-blast wave and explosion products in case of the shorter distance between the door and the explosion center,and the plastic deformation of the whole door can not appear;a deformation computation empirical formula for the burglary-resistant door subjcted to non-contact explosions is obtained.The study provided a guidance for explosive design to break a door for the purpose of anti-terrorist.