Numerical simulation analysis of explosive fragmentation characteristics of cylinder warhead
[Objective]The aim of this paper is to explore the distribution and power field characteristics of the explosive fragmentation of cylindrical warheads.[Method]The smoothed particle hydrodynamics(SPH)in ANSYS/AUTODYN are employed to establish a numerical model of cylindrical charge warheads.Based on the convergence analysis of SPH particle size,the MOTT fragment distribution model is used to val-idate the numerical model.A systematic analysis of the distribution and power field characteristics of frag-ments is then conducted by considering the detonation mode,detonation position,charge aspect ratio and charge mass.[Results]The results show that the detonation position and method significantly affect the ve-locity distribution of fragments at both ends of the cylindrical charge warhead.With an unchanged charge mass,the charge aspect ratio is confirmed to have limited influence on fragment velocity,but a more signific-ant impact on the mass distribution of fragments.Under the same charge aspect ratio,the fragment velocity in-creases with the increase in charge mass.However,the increase in velocity gradually decreases with the in-crease in charge.[Conclusion]The results of this study can provide important references for the design of warheads and the anti-strike protection structures of naval ships.
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