Experimental study on explosion effect in a closed single rectangular cavity

According to the design specifications of national defense works and human defense works, a closed single rectangular cavity model was developed to obtain the explosion load distribution at the walls of typical cavities and the corresponding destruction forms resulted from the explosion inside the cavities. The developed cavity model was applied to carry out internal explosion experiments, in which the mass of the TNT charge was increased gradually until the cavity model could be damaged. Pressure and acceleration sensors were used to record the explosion pressure-time curves and the vibration acceleration-time curves at the cavity walls, respectively. And the explosion load distributions at the cavity walls and the destruction form of the model structure were analyzed. The first peaks of the measured data were compared with the results of theoretical calculation and numerical simulation to discuss the cause for the errors among the three methods.