间隙厚度对改进爆炸零门可靠性窗口的影响

为了获得不同间隙厚度下爆炸零门可靠作用的时间窗口,通过LS-DYNA软件和试验,进行了装药尺寸为0.6 mm×0.6 mm,间隙厚度为0.6~1.1 mm的含圆形空气隙的改进爆炸零门的数值模拟和实验研究。仿真结果表明,间隙厚度小于1.0 mm,爆炸零门关闭时间不超过0.9μs,但随着间隙厚度的增加,爆炸零门成功关闭的概率会大幅度下降,甚至在1.1 mm时,爆炸零门失效。试验结果与仿真结果具有一致的规律性,间隙厚度达到1.0 mm时,零门可靠作用的时间窗口为4.0μs,+∞);间隙厚度为1.1mm时,零门的成功率较低。

Effect of Gap Thickness on Reliability Window of Improved Explosive Null Gate

To obtain the time windows of reliable effect for explosive null gate under the different gap thickness,the numerical simulation and the experimental research of improved explosive null gate with round air groove of charge size of 0.6 mm×0.6 mm and gap thickness of 0.6-1.1 mm were carried out through LS-DYNA software and test.The numerical simulation results show that when the gap thickness is less than 1.0mm,the closing time of explosive null gate dose not exceed 0.9 μs.However,with the further increase of the gap thickness,the success probability of explosive null gate will be significantly reduced.The explosive null gate fails even at 1.1 mm.The test results and simulation ones have a consistent regularity.When the gap thickness reaches 1.0 mm,the reliability time window of explosive null gate is 4.0 μs,+ ∞).When the gap thickness is 1.1 mm,the success probability of explosive null gate is low.