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利用空气炮发射的弹丸与钢靶板碰撞形成的过载冲击,研究搭载的桥丝式电雷管的损伤特性和规律。分别在60 000g、80 000g、100 000g和120 000g的加速度峰值下对独脚桥丝式电雷管试样进行冲击过载试验研究。研究结果表明:输入端加载时,电雷管的长度变化明显,电极和电极塞有不同程度的内陷,电阻变化不大;横向加载时,电雷管尺寸基本没有变化,独脚电极偏离中心轴线,随着加速度的增加,偏离角度也增大,桥丝随加速度增大也越容易发生断裂。这些特征和规律为此类电雷管损伤机理研究和结构设计提供了实验依据和理论指导。
The damage characteristics and regularities of the bridge-type electric detonator mounted by the air cannon were studied by using the impact of the impact of the projectile fired by the air gun and the steel target. Under the acceleration peak of 60 000 g, 80 000 g, 100 000 g and 120 000 g respectively, the impact overload test of one-foot bridge wire electric detonator was carried out. The results show that the length of the electric detonator changes obviously when the input is loaded, and the electrode and the electrode plug have different degrees of invagination with little change in resistance. The size of the electric detonator does not change when the device is loaded laterally, As the acceleration increases, the deviation angle also increases, and the bridge wire is more prone to fracture as the acceleration increases. These characteristics and laws provide experimental evidence and theoretical guidance for the mechanism and structural design of such electric detonator damage.