Numerical Simulation of Combined Liner Formation in Water

To enhance damage effect of torpedo warhead on large warship, a combined liner with annular-spherical segment/large cone angle structure is taken as the front charging chamber of the torpedo tandem warhead. The combined liner is composed of an annular liner around and a spherical segment liner or a large cone angle liner in the center. The formation mechanism of the combined liner in water is analyzed by the software LS-DYNA. The influences of the cone and curvature radius on the formation of the central liner in water are investigated in two priming modes. Simulation results show that: the annular liner forms annular jet in water to cut first layer of target shell; the change of central liner structure has little influence on jet formation of the annular liner; the long and the thin rod-liked jet formed by the central large cone liner has a high head velocity, while the rod-liked penetrator formed by the central spherical segment liner has a short and thick shape and relatively small velocity gradient.