不同量级TNT爆炸冲击波参数相似律实验研究

为研究不同量级的TNT装药爆炸冲击波参数相似律,开展了四种药量TNT静爆实验,获取了不同爆距地面测点的压力-时间曲线,得到了峰值超压、正压作用时间和正压冲量等冲击波参数,并与文献值进行了对比分析.结果表明,冲击波参数均满足爆炸相似律,当比例距离小于3时,实验数据统计规律较差.通过拟合,得到了适用公斤级到百公斤级TNT爆炸的冲击波参数经验公式.

Experimental Research on Similarity Law of Explosive Shock Wave Parameters with Different Orders of Magnitude TNT

In order to study the similarity law of explosive shock wave parameters with different orders of magnitude TNT, four static explosion experiments were carried out.At different measure points on the ground, some pressure-time curves of shockwave were got.Meanwhile, some parameters of shockwave were obtained, like peak overpressure, positive pressure time and positive pressure impulse, which were also compared with the data in the literature.The result showed that shockwave's parameters satisfied the explosion similarity law.However, when the scaled distance was less than 3, the statistical law of experimental data was poor.Through fitting quantities of experimental data, the empirical formulas of shockwave's parameters were obtained, which could be applied to the explosion of TNT whose magnitudes vary from several kilogram to several hundred kilogram.