Study On Multi-damage Effect Of Explosion

In this paper, a research has been made on the multi-damage effect of explosion, both theoretically and experimentally. Four kinds of explosion damage effect were considered, i.e. the damages by shock wave, heat radiation, fragment and suffocation. The emphasis of analysis was putted on human and buildings.According to the experimental data obtained by field tests, the characteristic parameters of shock waves from explosive explosions were analyzed. The curves of overpressure and impulse vs scaled distance were first fitted and then used for the analysis of damages from the shock waves of 27kg different explosives to human and buildings. The results show that the high-energy fuel in the explosives can lead to a higher power output than the ordinary explosives, such as TNT. The damage effect of heat radiation was explored, and a computer program about radiation parameters was compiled in order to make the calculation of parameters be more convenient and intuitive. A simplified model of fragmentation was made, and the speed of fragment was measured through static field test. Based on the achieved data, damages to human was evaluated by kinetic energy. The evaluation shows that fragments by 60g explosive could make injury or death in less than 3m. Furthermore, the calculation of oxygen content was deduced and was applied for 70g explosive in a room with 70m volume. The damage effect of oxygen concentration was analyzed.A comprehensive method for evaluating the multi-damage effect of explosion was initially proposed, and a calculation formula of TNT equivalent was derived for thermobaric warhead. In addition, the evaluation method was verified by means of explosion field test, and multi-damages from shock wave and fragment to humen and building were analyzed, which has proved the rationality of the method.