Numerical Simulation of Influence of Different Modes of Initiation on the Forming of Radial Shaped Jet

The formation processes of the radial shaped charge jet with different modes of initiation—center-point initiation, endpoint initiation and two-side symmetric initiation—were simulated using LS-DYNA finite element code.Our calculated results show that, comparatively speaking, the head velocity of the jet produced by two-side symmetric initiation is the highest, and that by center-point initiation takes the second place, while that by endpoint initiation is the lowest.Different initiation modes result in different angles between the detonation wave and the generatrix of the outside liner, and the smaller the angle, the higher the detontion load and collapse velocity, and the better the jet performaces.Meanwhile, under the circumstances of endpoint initiation, the detonation load and collapse velocity of the liner elements of both sides are different due to the liner asymmetry of detonation wave, which results in jet offset.