Spin effect of the small diameter shaped charge results in the centrifugal stress during the jet stretching process.Consequently, the jet scatters, which deceases the jet penetration capability.In the present study, a multi-section method was proposed to design the spin-compensation liner.The spin-compensation rate (SCR) of the liner was defined as the specific angular velocity that a fluted liner can offset.Based on the plain stress theory, SPH numerical method was applied to study the Curtains converging process of the 2D fluted structure.
The spin-compensation mechanism of the fluted structure was illustrated.Then, nine cross sections were chosen along the liner axis equidistantly.On each of the section, a 2D fluted structure was designed to offset a given initial angular velocity.After, the optimized fluted structures were integrated into a 3D fluted liner.Jet appearances of the normal liner and the fluted liners under different initial angular velocities were compared, which verifies the practicality of the multi-sectional method.
The multi-section optimization method provides a new efficient method of designing the shaped charge Phone Accessories liner for a specific usage.