不同量级TNT爆炸冲击波正压时间的试验研究

The Experimental Study on Explosion Positive Pressure Time of Diferent Orders of Magnitude TNT

为研究爆炸冲击波正压时间,进行了TNT自由场静爆试验,获取了不同装药量下的TNT爆炸冲击波正压时间数据,比较了试验值与经验公式计算值之间差异,并根据试验数据拟合得到冲击波正压时间表达式。结果表明,在对比距离珋r≤3.0范围内,冲击波正压时间依次为Sadovskyi公式计算值>Henrych公式计算值>试验测试值,而珋r约在5.0以后,试验测试值>Sadovskyi公式计算值。所拟合公式可用于TNT冲击波正压时间的计算,预估值与试验测试值相对偏差在合理范围内。

The positive pressure time of shock wave was obtained though static explosion tests of different loading doses of TNT which were taken in free field. Then the test value and the empirical formula value were compared to each other,and the expression formula of positive pressure time of shock wave was fitted based on the test data.The results show that the sequence of positive pressure time was Sadovskyi formula value Henrych formula value test value when the relative distance is less than 3. 0,and test value Sadovskyi formula value while the relative distance more than 5. 0. The fitting formula can be used to calculate the positive pressure time of TNT explosion shock wave for the damage analysis. The relative deviation between assessment value and test value is in a reasonable range.