为了分析爆轰波叠加作用下45#钢杆的断裂行为,进行了爆轰波叠加效应试验。通过数值模拟分析了杆条受力分布及断裂过程,分析了起爆模式、起爆间距和装药高度对杆条断裂行为的影响,并通过试验对数值模拟结果进行了验证。结果 表明,爆轰波叠加后产生一条狭窄的压力增强带,在试验靶板上造成深度为1mm的刻痕; 起爆模式影响受力分布的均匀性,起爆点位于传爆药一端时,靠近起爆点一端的杆条所受压力峰值明显低于其他杆条; 起爆点位于传爆药中心时,杆条受到爆轰波的作用时间更加集中,且压力大小接近; 装药高度与起爆间距的比值在0.75～1.25之间时,爆轰波叠加后作用到杆条的压力随着装药高度或起爆间距的增加而增大。起爆间距对爆轰波叠加压力的影响比起爆点位置和装药高度的影响更明显。
To analyze the fracture behavior of steel #45 rods under the effects of detonation wave interaction, a detonation wave interaction effect experiment was carried out. Force distribution on the rods and fracture process were analyzed through numerical simulation. The initiation effect of mode, initiation distance and charge height on the fracture characteristics of the rod fracture process was analyzed. The numerical simulation results were verified by experiment. The results show that a superimposed detonation wave produces a narrow pressure-enhancement zone, which results in a 1mm-depth notch on the experiment target. The initiation mode affects the force distribution on the rods. When the initiation point is at one end of the booster,the peak pressure on the rod near the initiation point is obviously lower than that on the other rods,and when the initiation point is at the center of the booster,the time of the rod subjected to the detonation wave is more concentrated and the pressure is similar. When the ratio of charge height and initiation distance is between 0.75 and 1.25, under the interaction of the superimposed detonation wave, the pressure on the rod increases with the increase of the charge height or the detonation distance.The effect of initiation distance on the detonation wave superimposed pressure is more obvious than that of initiation position and charge height.
