An infinitesimal element method of numerical analysis for the generation principle of linear shaped charge

The liner shaped charge produced jet was studied. Key parameters to evaluate the performance of the jet, such as velocity distribution of material of liner, tip velocity of the jet and critical velocity were obtained. In addition, moving pattern and interaction of material sections of liner and the structural models of the jet was studied. Calculated result indicates that effective jet velocity of the liner shaped charge with small degree liner is over 550 m/s for steel target with general strength, the high speed section (v≥1 300 m/s) of the effective jet is made up by the top of the cover, medium speed section (1 000 m/s≤v<1 300 m/s) are made up by the central and middle higher parts of the cover, 20% of the bottom of cover not taking part in forming the jet.