Numerical investigation of the characteristics of the non-explosive underwater shock

Non-explosive underwater shock experiment exhibits many advantages as a lab-scale research method of underwater explosion, including high reliability, low cost, and so on. This method has an important sense to research of underwater explosion. In this paper, the propagation characteristics of non-explosive underwater explosion shock were investigated with experimental and numerical simulation. The dependence of shock wave strength and decay constant on the flyer mass, impact velocity of flyer and piston mass were investigated. According to the simulation results, expressions of initial peak of shock wave and decay constant were respectively established. The results indicate that the initial peak of shock wave only varies with the impact velocity of flyer, and the decay constant can be set by suitable adjustment of the flyer mass and piston mass.