Numerical simulation on energy output optimization of D shaped warhead charge

DOI:	10.11809/bqzbgcxb2023.08.018
Keywords:	explosion mechanics; D shaped warhead; energy output; multi point initiation; numerical simulation
Abstract:	In order to solve the problem that the D shaped section warhead has a poor uniformity of the energy output, this paper designs and optimizes a multi point initiation method. Based on the AUTODYN finite element numerical simulation, the propagation of the detonation wave in the D shaped section warhead is studied under different initiation modes, and velocity and spatial distribution of the fragments are analyzed. Moreover, the effect of different cross sectional shapes on the uniformity of the energy output of the charge is studied, and, under the optimal initiation mode, the effect of different length diameter ratios on the energy output of the charge is discussed. The research results show that, compared with the single point initiation, under the three point initiation mode, the fragment velocity is up to 615 m/s, and the dispersion synchronization increases by 60%. As the symmetry of the profiled shaped section increases, the uniformity of the energy output of the charge significantly improves. With the increase of the length diameter ratio, the average velocity of the fragments in the middle of the warhead increases by 67.4%, and the dispersion synchronization increases by 56.6%. In addition, the energy utilization rate of the charge increases.
Published:	2023-08-28
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