Abstract
The water hammer effect produced when fragments penetrate the liquid tank on warship will cause integral expansion and damage to the structure of the liquid tank. In this paper, a kind of liquid-filled honeycomb structure reinforced by Kevlar fiber tube is designed, and the mechanism of Kevlar fiber tube reinforced honeycomb liquid-filled structure against fragmentation is analyzed. The numerical model of Kevlar reinforced honeycomb liquid-filled structure is established, and the process of high-speed fragments penetrating the defense structure is analyzed by ALE calculation method, and the armor-piercing test of liquid-filled structure is carried out, which verifies the reliability of simulation calculation. The influence of honeycomb core layer and Kevlar fiber tube on the defense of liquid-filled structure against high-speed fragment is further discussed. In addition, an air compartment is arranged in the honeycomb liquid-filled structure to weaken the water hammer effect. It is found that the air compartment has a slight decrease in the ability to weaken the fragment velocity, but it greatly reduces the damage degree of the structure caused by fragment penetration.
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