Using shaped charges with a “magnetic cut-off” for testing anti-meteoroid shields

Abstract

This research is an investigation about the possibility of using shaped charges forming high-velocity metal jets to obtain high-velocity compact elements. The particular objective here is testing rocket and space technology objects for anti-meteoroid resistance. In order to “cut off” the jet head section and obtain a compact element with a velocity of 10 km/s, it is proposed to create an axial magnetic field in the shaped charge liner before its explosion. Strengthening the magnetic field in the jet formation region during the liner collapse leads to destroying the main part of the forming shaped-charge jet. This is associated with radial dispersion of its material due to the accompanying “pumping excitation” field of powerful electromagnetic forces. In this case, it is possible to maintain the jet head section at maximum velocity. The possibility of choosing an initial magnetic field intensity has been analyzed. This is done based on numerical modeling in the framework of the two-dimensional axisymmetric problem of continuum mechanics and electrodynamics, assuming ideal conductivity of the liner material. The way of doing so is that only the head section of the jet is formed normally and its subsequent sections are scattered. As calculations showed, the goal is achieved in the case of using conical shaped charge liners with apex angles of 60° … 80° at induction of the magnetic field created in the liner at level of tenths of a tesla which is technically quite easy to implement.