Numerical analysis of the explosive aluminium particles formation in the 2…16 km/s speed range
Published: 29.01.2023
Authors: Kolpakov V.I., Fedorov S.V., Vinogradova E.P.
Published in issue: #1(133)/2023
DOI: 10.18698/2308-6033-2023-1-2240
Category: Mechanics | Chapter: Mechanics of Deformable Solid Body
Explosive gun launchers are used to test rocket and space systems for their resistance to the impact of meteoroids and fragments of space debris. This work applies numerical simulation within the framework of the two-dimensional axisymmetric problem of continuum mechanics and substantiates design parameters of the shaped charges that form compact aluminum particles weighing up to 1 g and more in a wide range of speeds (from 2 km/s to 16 km/s). Simulation was carried out in relation to the shaped charges of different diameters (from 20 mm to 100 mm) using the ANSYS/AUTODYN, ERUDIT and KOLDUN computer systems. It is shown that charges of larger diameter are required to form faster particles identical in mass. Besides, it is necessary to use segmental cumulative liners of digressive thickness to form particles approaching the lower boundary of the indicated speed range. Wherein, to form faster particles moving at the speeds from 10 km/s to 16 km/s, it is necessary to implement the combined shaped charge liners, where the jet-forming part is shaped as a semi-ellipsoid or a semi-superellipsoid of rotation of the digressive thickness.
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