| Autor: |
Fedorov, S. V., Kolpakov, V. I., Vinogradova, E. P., Bolotina, I. A. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2023, Vol. 2549 Issue 1, p1-7, 7p |
| Abstrakt: |
In near-earth space it is becoming increasingly clogged by debris, the main part of which is spent stages of launch vehicles and degraded spacecraft. These fragments are mainly composed of aluminum alloys. Explosive launching devices are used to test objects of rocket and space technology for resistance to the impact of meteoroids and fragments of space debris. These include shaped charges with a combined hemisphere-cylinder liner. In these charges, the formation of a high-speed compact element occurs as a result of "cutting-off" by the collapsing cylindrical part of the liner of the head section of the jet flow formed from the hemispherical part of the liner compressed by the explosion products. Currently used shaped charges with a hemisphere-cylinder liner make it possible to obtain compact steel elements with speeds of 6 km/s. It was considered the possibility of obtaining aluminum particles with velocities up to 16 km/s using shaped charges with a combined shaped-charge liner on the basis of numerical modeling within the framework of a two-dimensional axisymmetric problem of continuum mechanics. The simulation was carried out for a shaped charge with a diameter of 100 mm using the ANSYS / AUTODYN and ERUDITE computer codes. To achieve this goal, the jet-forming part of the liner was given a degressive thickness, and the surfaces bounding it had the form of surfaces of a semi-ellipsoid or semi-superellipsoid of revolution. The geometric parameters of the combined liner were selected based on the results of the calculations, which made it possible to form an aluminum particle with a given level of velocity with its mass in tenths of a gram. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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