Effect of Powder Liner's Density Distribution on Perforation Performance

摘要

In order to study the influence of the density distribution of the liner on the jet velocity gradient and the penetration performance, two numerical models of the typical density distribution of the powder liner were established. One is the uneven distribution of the axial density of the powder liner, and the other is the uneven distribution of circumferential density of the powder liner. The LS-DYNA software was used to calculate the multi-condition numerical values, and the shape, velocity gradient distribution and penetration depth of the jet are obtained. The jet velocity and the depth of the perforation are calculated and analyzed in combination with the quasi-steady theory of fluid mechanics and the virtual origin concept. The results show that the axial density of the powder liner has a certain increase on the jet shape and penetration depth. The density of the powder liner is unevenly distributed in the circumferential direction, and the jet has a tendency to deflect toward high density.