爆炸冲击波超压非均匀分布特性及最优测点数量

The causes and manifestations of non-uniform spatial-temporal distribution of overpressure peak of explosion shock wave are discussed from the characteristics of non-ideal detonation wave and the formation mechanism of explosion shock wave, which are verified by experimental images and data. Four kinds of 2 kg explosives and a 250 kg aluminized explosive were detonated to investigate the non-uniform distribution characteristics of shock wave overpressure, and the deviation among the overpressure peaks with the same distance to charge were analyzed. The results show that the higher the non-ideal level of explosive componentsis, the greater the charge mass is, and the closer it is to the charge, the more obvious the non-even characteristics of the overpressure peak are. A method to define the number of test points to meet the accuracy demand for the overpressure is proposed based on the analysis of the experimental data. It is suggested that the blast field should be divided into four areas with scale distances of less than 1. 5 m / kg¹ / ³ , 1. 5 ~ 3. 0 m / kg¹ / ³ , 3 ~ 5 m / kg¹ / ³ and more than 5 m / kg¹ / ³ . The corresponding optimal number of measuring points is 6, 5, 4 and 2,respectively.