Evaluating the accuracy of pressure measurements on the surface of shock waves propagating in an underwater environment of experimental explosion

Currently, the calculation of pressure on the surface of shock waves propagating in underwater environments is based on research findings inherited from Russia and the United States corresponding to standard conditions. To inherit and conduct experimental research on underwater explosions under different conditions in our context, it is necessary to study the selection and propose appropriate experimental model parameters, including the amount of explosive material, the depth of charge placement, and the water depth. Based on the analysis of theoretical explosive hydrodynamics in the water environment, this paper introduced the results of an experimental model, calculated and determined the boundary condition parameters of the experimental model, and conducted underwater explosion experiments. Using the explosion similarity method to represent relative pressure as a function of relative distance and the least squares method on Excel tool to establish experimental laws for the distribution of maximum pressure on the shock wave surface by distance. The obtained results reveal a decreasing law of maximum pressure on the shock wave surface with an exponent coefficient consistent with the research findings in Russia and the United States but with a deviation in amplitude oscillation matching of -7.6% and -5.9%. The research results confirm that the proposed experimental model can be applied to perform experimental research for different purposes while still ensuring the necessary accuracy.