Simulation Study on Adjustable Structural Shaped Charge Water Jet Forming and Penetrating Improvised Explosive Devices

Abstract To address the need for rapid and safe disposal of improvised explosive devices during bomb disposal operations, a method utilizing a structurally adjustable shaped water jet for the destruction of improvised explosive devices is proposed. Finite element analysis software AUTODYN is employed to develop a simulation model to study the formation process of the shaped water jet. To further explore the influence of structural parameters of the shaped charge on the jet head velocity and effective jet length, an orthogonal optimization design method is utilized. The water thickness and cone angle of the water-filled liner are selected as key structural parameters for numerical simulation, aiming to obtain the optimal parameter combination for the shaped charge structure. Based on this optimal shaped charge structure, a simulation model for the penetration of improvised explosive devices by the shaped water jet is established. Theoretical analysis and simulation results indicate that a reasonably designed shaped charge structure can generate a water jet capable of safely neutralizing improvised explosive devices without detonating the explosives.