动载荷下含空气泡的TNT装药安全性能的实验研究

AN EXPERIMENTAL STUDY ON THE SENSITIVITY OF TNT CHARGE WITH AIR HOLE UNDER DYNAMIC LOAD

本文采用自行设计加工的“应力发生器”装置,对被试验炸药施加上升时间为10—30ms的压力加载;应用数理统计的方法(试验设计的“正交法”和感度试验的“上下法”),实验研究了含有各种空气泡的压装TNT在此压力加载下的安全性规律,并由此外推得到了不含空气泡的压装TNT在此压力加载下的安全性能。

In this paper, an installation called 'pressure generator', made by us for generating pressure loadings with different rise time ranging10-30ms, was used to investigate the sensitivity of explosives which contain internal air holes. Up-and-down method were ul-tilized to perform, the sensitivity measurement for pressed TNT samples with internal air holes, and in turn the characteristic sensitivity of the same samples but without air holes was deduced from extrapolation method.From these experiments, we found that both volume and number of the air holes exhibit significant influence on the sensitivity of the pressed TNT, and the volume effect appears more important. The bigger the air hole volume, the lower the sensitivity of the TNT is, while the number of air holes keeps constant. The more the air holes, the lower the sensitivity of TNT is, while the volume of the air holes keeps constant. It is also showed that if there contained a single air hole, the characteristic sensitivity of the TNT will increase with increasing the diameter of the hole with cubic power law.