Experiment and numerical simulation of shock wave propagation and bubble impulse of underwater explosion

Experimental investigations were carried out on the shock wave propagation and bubble impulse of underwater explosion of the spherical TNT and cylindrical aluminized explosives. The physical process of underwater explosion under gravity was simulated and analyzed using MSC.DYTRAN finite element analysis software. The computational results were compared with experimental results, which show that the structure-fluid coupling method can be used precisely to simulate the propagation of shock wave and the motion of bubble. The effect of grid density, length-diameter ratio of cylindrical explosive, propagation distance and explosion angle on the peak pressure of shock wave was analyzed and summarized. The finite element model, method and computational results in the study are of a certain reference value to relative engineering research and calculation.