12.7毫米弹丸对装甲正面冲击的数值分析

M. Pešić, Aleksandra Živković, Aleksa Aničić, Lazar Blagojević, Petko Bonchev, Predrag Pantović
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引用次数: 0

摘要

介绍/目的:本文对一枚12.7 mm弹丸在900 m距离上以500 m/s的速度撞击装甲金属板进行了数值模拟。与计划、组织和执行实验所需的时间相比,数值模拟提供了大大减少获得结果所需时间的可能性。数值模拟是通过装甲金属板厚度的变化来完成的,特别是厚度为10mm, 17mm, 18mm和23mm的装甲金属板。根据结果选择上述装甲板厚度,以确定弹丸穿孔极限装甲板的极限厚度,以及完整的弹道防护。方法:采用有限元方法对铠装板进行应力和变形分析。该方法计算了弹丸对障碍物的冲击,准确地说是弹丸与装甲板的碰撞。结果:为进行对比分析,采用的参数为应力值和位移值。对于上述每种厚度的装甲金属板,确定了弹丸冲击时的应力和位移值。研究结果显示了装甲板厚度对弹丸与装甲板相互作用的影响。结论:在装甲板物理化学特性不变的情况下,随着装甲板厚度的增加,弹丸侵彻的可能性减小,反之亦然。由于装甲板的基本作用是保护人员和设备免受弹丸冲击,因此对其应力和变形进行分析具有重要意义。在这方面,确定了半侵彻弹丸的装甲板厚度。
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Numerical analysis of a frontal impact of a 12.7 mm projectile on an armor plate
Introduction/purpose: The paper presents a numerical simulation of an impact of a 12.7 mm projectile on an armored metal plate with a velocity of 500 m/s at a distance of 900 m. Numerical simulations offer the possibility of drastically reducing the time required to obtain results in comparison to the time required for planning, organization and execution of experiments. The numerical simulation is done by variations in the thickness of the armor metal plate, specifically an armor metal plate of a thickness of 10 mm, 17 mm, 18 mm, and 23 mm. The mentioned armored plate thicknesses were chosen based on the results in order to determine the limit thickness of the armored plate for the projectile perforation limit, as well as for complete ballistic protection. Methods: Finite element modeling is used for analyzing stresses and deformations of the armored plates. The mentioned method calculates the impact of the projectile on the obstacle, precisely the collision of the projectile and the armor plate. Results: For the comparative analysis, the parameters used are the values of the stress and the displacement. For each of the above-mentioned thicknesses of the armored metal plate, the values of stress and displacement during projectile impact were determined. The results of this study show how the thickness of the armor plate affects the interaction of the projectile and the armor plate. Conclusion: If the physical and chemical characteristics of the armored plate remain unchanged, as the thickness of the armored plate increases, the possibility of projectile penetration decreases, and vice versa. This research is of essential importance because it analyzes the stresses and deformation of armor plates whose basic role is the protection of personnel and equipment from the projectile impact. In this regard, the thickness of the armored plate for semi-penetration of the projectile is determined.
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