Experiment and Numerical Simulation Study on Near-field Underwater Explosion of Aluminized Explosive

Aluminized explosive can improve the energy output structure and power of detonation products. The application of aluminized explosive to underwater explosion enhances the brisance and damage capability of underwater weapons significantly. The near-field underwater explosion experiments of aluminized explosive RL_F and TNT were carried out using PVDF pressure sensor based on electrical measurement method, and Coupled Eulerian-Lagrangian (CEL) method was used for simulation. The numerical results agreed well with experimental and empirical ones. The results show that CEL method can be used to simulate the propagation process of near-field underwater explosion shock wave of TNT and aluminized explosive accurately if reasonable boundary conditions, calculation parameters and finite element model are adapted. Near-field underwater shock wave pressure attenuation of aluminized explosive is slower than TNT. Then, the approximate regression formulas of near field underwater explosion shock wave peak pressure of TNT within 6 times of charge radius and aluminized explosive in a certain distance range are obtained by fitting the simulation results.