The Study Of Blast Field Parameters And Damage Characteristics Of Three Kinds Of Explosives

Based on theoretical and experimental analysis, the blast field parameters and damage characteristics of ordinary high explosive, single event FAE (SEFAE) and double event FAE (DEFAE) were comparatively investigated in this thesis.With the use of high-speed camera picture data, the process of fuel dispersal and fireball expansion of single event FAE and double event FAE were observed and analysed. Combined with previous studies, the formation mechanism and explosion reaction process of FAE were investigated. The cloud cavity size, the duration and position of second ignition of double event FAE were confirmed. The performance of after-burning of SEFAE was also analyzed.Based on the rule of overpressure-impulse damage effect, the damage model of the personnel and building by the shock wave was analyzed. According to the analysis of test data of three kinds of explosives, the comparative study of the blast field parameters, such as overpressure, impulse and positive pressure duration, were obtained. The TNT equivalents of SEFAE and DEFAE were also calculated using the calculation formula obtained from the overpressure data of local TNT explosion experiment. Besides, comparative analysis of several different test methods of explosive field parameters was accomplished based on the principles and results.The temperature field of TNT, SEFAE, and DEFAE were captured by using the MikronScan 7200 Thermal Imager. Based on comparative analysis of temperature field parameters, such as the maximum temperature, duration, fireball volume, the thermal radiation abilities of three typical explosives were given. The result indicated that the thermal damage ability of DEFAE is maximum, then SEFAE, and finally TNT.