爆炸焊接用半球阻波器内爆数值模拟

Numerical simulation of implosion in hemispherical resisting wave instrument used for explosive welding

为了解决爆炸焊接冲击波和噪声的破坏问题,提出了在半球阻波器内进行爆炸焊接技术。对爆炸焊接半球阻波器内爆进行分析,对炸药爆炸、冲击波传播、冲击波反射进行数值模拟,分别对TNT炸药和ANFO炸药的爆炸进行计算,并与用亨利奇公式计算结果进行比较,得出适应于爆炸焊接半球阻波器强度设计和消声设计的压力时程关系,确定了爆破荷载下危险应力位置,为半球阻波器的可靠性评定及优化提供参考依据。模拟结果表明:空气冲击波最先到达门口正方向的壳壁,在门口、排烟口和正对门口壳壁处压力最大。

In order to solve the destruction problems of shock waves and noise brought by explosive welding, the technology of explosive welding in hemispherical resisting wave instrument is put forward. This paper analyzes the explosive welding in hemispherical resistance wave instrument, explosive blasting, shock waves propagation, and shock waves reflection are simulated for TNT and ANFO respectively. Compared with Henrych＇s formula, pressure time path relation that is used to design the strength and noise elimination of hemispherical resisting wave instrument is gotten, and the dangerous stress position under explosion load is determined, which also provide reference for the reliability assessment and optimization of hemispherical resistance wave instrument. The simulation results indicate that shock wave arrives at shell wall in the direction of entrance firstly, moreover the most pressure is at doorway, exit of venting smoke and hell wall in the direction of entrance.