Numerical simulation and experiment research of large mass and high dynamic penetrating warhead explosive fragment distribution

DOI:	10.11809/bqzbgcxb2023.09.028
Keywords:	penetrating warhead; large mass; high dynamics; natural fragmentation; Mott distribution
Abstract:	Aiming at the problem of the distribution law of the natural fragmentation characteristics of the dynamic explosion of large mass and high dynamic penetrating warheads, this paper designs a dynamic simulation test based on the speed and explosion point controllable of the rocket sled launch platform, and obtains the flying and scattering characteristics of the large mass intrusion of the warhead explosion fragments with a speed of 800 m/s. This paper proposes a method of segmented processing of warhead geometry, generates a reasonable random natural fragmentation group by Mott model, and constructs a control equation of Lagrange energy system by using FEM and DEM coupling method, and uses dynamic relaxation method to explicitly iteratively solve the equation. It also carries out numerical simulation of the evolution process of the whole space time domain of the fragmentation site. Through the comparative analysis of the simulation and test results, the relative error of the number of natural fragmentation targets is 3.3%, and the relative error of the calculation of the flying dispersion angle is 1.22%, which verifies the reliability of the numerical simulation method. This study provides an accurate prediction method for the penetration of the warhead fragment distribution under large mass and high dynamic conditions, and it also provides support for the evaluation of the damage efficiency of large mass and high dynamic penetrating warheads.
Issue:	Vol. 44 No. 9 (2023)
Published:	2023-09-28
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