The Numerical Simulation of Composite Explosive Energy Coupling in Underwater Explosion

This paper choose three kinds of explosives and two kinds of charge structure, the inner and outer layer, the left and the right structure. It studies the energy coupling between the two parts of explosives and the influence of charging way of energy output structure. Ls-dyna is used to numerically simulate the process, analyze this kind of composite explosive shock wave overpressure - time history curve and the change of temperature field with time when the explosive blast in deep water. Their energy outputs were compared with single formula of explosive. Simulation results show that: Using the same chemical composition, Different dual charging structure of explosives has an impact on the explosion of the same point load and the heat loss. The energy couples between two parts of explosive.