TNT内爆炸准静态压力特性

为研究密闭空间内TNT爆炸准静态压力特性，通过理论分析得到了准静态压力计算模型，以爆炸罐和爆炸舱室为典型密闭空间环境开展了系列TNT内爆炸实验。结果表明，准静态压力的上升伴随着内爆炸冲击波的多次反射，反射结束后准静态压力到达峰值，药量-容积比是准静态压力的主要影响因素，准静态压力峰值及上升速率随着药量-容积比的增加而增加；基于实验数据拟合得到了TNT内爆炸准静态压力峰值经验公式，可用于准静态压力峰值预估及内爆炸威力评估。

Quasi-static pressure characteristic of TNT's internal explosion

In order to estimate the quasi-static pressure of TNT when it explodes in closed space, the calculation model of the quasi-static pressure is derived basing on the theoretical analysis. Moreover, a series of TNT's internal explosion tests are performed, these tests take the explosion vessel and explosion chamber as the closed container. The results show that the quasi-static pressure increases accompanied by multiple reflections of shockwave and the pressure reaches to the maximum when the reflection is over. The ratio of charge quality and volume is the main factor influenting quasi-static pressure. The peak and increasing rate of quasi-static pressure will increase with the growth of the ratio of charge quality and volume. According to the experimental data of TNT's internal explosion, the empirical formula of the peak for the quasi-static pressure is fitted, The formula can be used to calculate of quasi-static pressure's peak value and assess the lethality of internal explosion.