针对呼吸器氧气瓶压力失效造成的危害,采用显式非线性动力有限元软件LS-DYNA对一定TNT当量下的圆柱形氧气瓶进行数值模拟,分析氧气瓶受力爆破过程,得出氧气瓶在压力失效爆破时元素节点的速度。结果表明:氧气瓶在中心环面处出现塑性失稳,裂纹轴向扩展进而爆破,破片元素速度较大,为氧气瓶防爆装置设计提供理论基础。 Aiming at the damage caused by the pressure failure of the oxygen bottle of respirator, the explicit non-linear dynamic finite element software LS-DYNA was used to simulate the cylindrical oxygen bottle under a certain TNT equivalent pressure. Element node velocity in burst failure. The results show that the plastic bottleneck of the oxygen cylinder appears at the central annulus, the crack expands axially and then explodes, and the fragmentary element velocity is relatively high, which provides the theoretical basis for the design of the oxygen cylinder explosion-proof device.