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8455172 
Journal Article 
Propagation of blast wave of thermobaric explosive inside a tunnel 
Geng, Z; Li, X; Miao, C; Fang, H 
2017 
36 
5 
23-29 
Chinese 
Blast wave of thermobaric explosive is a serious threat to personnel and equipment inside a tunnel. Firstly, based on TNT blast test data verification, a numerical calculation model for an explosion entrance was established with the software AUTODYN. Secondly, the blast wave propagation characteristics inside a tunnel of thermobaric explosive whose state equation was described with JWL-Miller energy release model were studied through comparing with those of TNT blast wave. The constraint effect of a tunnel on the blast wave of thermobaric explosive was also investigated through comparing the propagation characteristics of thermobaric explosive side a tunnel with those on unconstrained ground. The results showed that thermobaric explosive has a greater destructive power; the average peak overpressure and positive phase impulse of thermobaric blast wave are1.91 times and 1.82 times of those of TNT, respectively; the equivalent coefficients of average overpressure and impulse of TNT for thermobaric explosive are1.94 and 2.21, respectively; the tunnel constrain effect on the blast wave of thermobaric explosive is obvious, the average peak overpressure and positive impulse of thermobaric shock wave in a tunnel are 13.55 times and 15.21 times of those on unconstrained ground. © 2017, Editorial Office of Journal of Vibration and Shock. All right reserved. 
Blast wave; JWL-Miller state equation; Thermobaric explosive