Selection of shaped charges parameters for producing aluminum particles with velocities in the range of 2.5–16 km/s

IF 5 Q1 ENGINEERING, MULTIDISCIPLINARY

Defence Technology(防务技术) Pub Date : 2024-08-01 DOI:10.1016/j.dt.2024.01.004

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Abstract

Testing rocket and space technology objects in ground conditions for resistance to the impact of meteoroids and fragments of space debris can be carried out using shaped charges. To substantiate the design parameters of shaped charges that ensure the formation of aluminum particles in a wide velocity range (from 2.5 to 16 km/s), numerical modeling of the formation process was carried out within the framework of a two-dimensional axisymmetric problem of continuum mechanics using three different computing codes to increase the reliability of the results. The calculations consider shaped charges with a diameter of 20–100 mm with aluminum liners of various shapes. It is shown that the formation of particles with velocities close to the lower limit of the considered range is ensured by gently sloping segmental liners of degressive thickness. To form higher-velocity particles with velocities over 5 km/s, it is proposed to use combined liners, the jet-forming part of which has the shape of a hemisphere of constant thickness or the shape of a semi-ellipsoid or semi-superellipsoid of rotation of degressive thickness.

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为生产速度为 2.5-16 千米/秒的铝粒子选择定形装药参数

在地面条件下测试火箭和空间技术物体是否能抵抗流星体和空间碎片的撞击，可以使用定形装药进行。为了证实能够确保在较宽的速度范围（2.5 至 16 千米/秒）内形成铝颗粒的异型装药设计参数，在连续介质力学二维轴对称问题的框架内，使用三种不同的计算代码对形成过程进行了数值建模，以提高结果的可靠性。计算考虑了直径为 20-100 毫米的异形装药和各种形状的铝衬里。结果表明，速度接近所考虑范围下限的颗粒的形成，可通过厚度递减的平缓倾斜的分段衬板来保证。为了形成速度超过 5 千米/秒的高速粒子，建议使用组合内衬，其喷流形成部分的形状为厚度不变的半球形或厚度减小的半椭球形或半椭球旋转形。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Defence Technology(防务技术) Mechanical Engineering, Control and Systems Engineering, Industrial and Manufacturing Engineering

CiteScore

8.70

自引率

0.00%

发文量

728

审稿时长

25 days

期刊介绍： Defence Technology, a peer reviewed journal, is published monthly and aims to become the best international academic exchange platform for the research related to defence technology. It publishes original research papers having direct bearing on defence, with a balanced coverage on analytical, experimental, numerical simulation and applied investigations. It covers various disciplines of science, technology and engineering.