Underwater Acoustic Jammers Interfere With The Bullets Key Technology Research

Acoustic interference device is soft kill anti-torpedo weaponry which based on the sound reverberation effect of underwater continual explosion, and the interference submunitions are important part of it. In order to provide a reference for the optimization of submunition, four key technologies were studied by using probability theory and simulation method.In order to explore the successive failure probability of underwater continual explosion submunitions group, it was analyzed and calculated by probability theory and Monte-Carlo method. With the number increase of submunitions, the successive failure probability of explosion submunitions group will increase linearly. In view of groups with the submunitions number of 300 to 500, the appearance probabilities of 2 and more successive failure are 0.74% to 53.26%,3 and more are 0.0032% to 3.01% and 4 and more tend to be 0 when single failure probabilities are 0.5% to 4%.The force performance of electrical connection ball showed that water pressure might lead to an instantaneous power failure of the fuze power switch when it was filled with sea water, so the improvement measures such as taking the materials of electrical connection ball or electrical connection film for magnetic material were proposed. The simulation results by using Ansoft Maxwell 3D showed that the improvement measure which provided a magnetic force about of 2.8 x 103 N/kg benefited for raising the electric effect correctness.In order to provide a reference for the design, the processes of submunitions falling into water with different velocities and attitudes were simulated by using the ANSYS/LS-DYNA software. The results showed that the impact load achieved the maximum when the submunition fell into water with vertical posture. With the increase of the initial velocity, the impact load would increase linearly when the initial velocity was between 20 m/s to 200 m/s.Taking the gap of explosive components filled with water as precondition, the explosion transmission of explosive train was simulated by using the ANSYS/LS-DYNA. The results showed that water played a great role in the blast attenuation. Reducing the gap of explosive components could cut down the blast attenuation degree. Increasing the power of detonator and lead benefited for improving performance of explosion transmission. Water pressure had little effect on it under the presupposition that shock wave initiation only be considered.