Efp Penetration Of Water Media Target Mechanism Simulation Study

A number of technical measures including advanced high-strength shell materials, multi-layer armor and multi-layer fluid compartment structure have been applied to the modern ships. Thus, its protective capacity has been enhanced greatly. It is difficult to give a fatal attack to the vessels using the conventional weapons in the water. Shaped charge warhead is one of the effective ways to damage the vessels, which is used to improve the performance of torpedo warheads. The EFP penetrator followed by the high-speed water flow enhances the damage effect to ship target because the high-speed water flow can also perforate the ship target continually after the EFP penetrator. Therefore, the study on the law of underwater shaped charge warhead has great significance to the development of ammunition technology, especially for the new and large power torpedo warhead.The small aspect, high density head EFP shaped charge warhead that suitable for penetration the shell of ship was designed, optimized and power calibrated on the basis of the mature theory proposed by the published references and numerical simulation technology. The attenuation law of the velocity of EFP, the velocity and pressure fields of water medium and the damage mechanism of the shell of ship were obtained by the numerical simulation.Comparison shows that the results of numerical simulation are in agreement with the results and phenomenon of experiments. Preliminary studies indicate that the ballistic wave of underwater has a significantly enhanced damage effect to the ship target. The thickness of the water has direct influence on the damage effect of EFP to the ship target. The largest damage effect of target can be obtained when the thickness of water is suitable. The critical perforation thickness of ship target can also be obtained from the linear relationship between the residual velocity of the EFP and the thickness of ship target.