研究矩形高爆炸药的形状参数和起爆点对爆炸荷载空间分布的影响

IF 3.8 2区 工程技术 Q1 ENGINEERING, MECHANICAL
Longkui Chen  (, ), Hongyu Zhao  (, ), Yongliang Zhang  (, ), Shenghong Huang  (, ), Chunhai Li  (, )
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引用次数: 0

摘要

矩形炸药通常用于军用或民用炸药的运输和储存。形状参数和起爆位置对爆炸峰值超压和最大冲量的影响缺乏全面的研究,这对抗爆结构的设计意义重大。本文选择矩形的边长比、方向和装药的起爆位置作为控制参数,研究它们在 0.63 至 10.54 m/kg1/3 的量规比例距离内对爆炸荷载的影响,并进行了有效的三维数值模拟。结果表明,矩形装药爆炸荷载的近场空间分布存在很大差异;如果简单地用球形装药评估矩形装药的爆炸荷载,最大峰值超压(最大冲量)将被低估 7.46(4.84)倍。这一点必须引起抗爆结构设计人员的重视。随着缩放距离的增加,当临界缩放距离大于 6.32 (7.38) m/kg1/3 时,可以忽略装药形状对空间爆炸荷载最大峰值超压(最大脉冲)的影响。一般来说,与中心起爆相比,端部起爆的装药对最大峰值超压的影响更大,但对于最大冲量的影响,需要注意矩形装药的边长比和端面的具体起爆位置。此外,初步分析了在矩形装药爆炸荷载作用下,不同方位角放置的钢板的结构响应,结果表明钢板的变形和能量与爆炸荷载的分布是一致的。这些分析结果为近场空气爆炸中的防爆设计提供了参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the effect of shape parameters and initiation points of rectangular high explosive on the spatial distribution of blast loads

Rectangular explosive charges are usually used in military or civilian explosive transportation and storage. The effects of shape parameters and detonation positions on the peak overpressure and maximum impulse of blasts lack comprehensive investigation, which is significant for the design of blast-resistant structures. In this paper, the side-length ratio of the rectangle, orientation, and detonation position of the charge are chosen as controlling parameters to investigate their influence on blast loads in the scaled distances of the gauges ranging from 0.63 to 10.54 m/kg1/3 with well validated 3D numerical simulations. The results show that there is a large difference in the near-field spatial distribution of the blast load of the rectangular charge; if the blast load of the rectangular charge is simply evaluated with the spherical charge, the maximum peak overpressure (maximum impulse) will be underestimated by a factor of 7.46 (4.84). This must be taken seriously by blast-resistant structure designers. With the increase in the scaled distance, when the critical scaled distance is greater than 6.32 (7.38) m/kg1/3, the influence of the charge shape on the maximum peak overpressure (maximum impulse) of the spatial blast load can be ignored. In general, the impact of detonation of the charge at the end on the maximum peak overpressure is greater compared with central detonation, but for the impact of the maximum impulse, it is necessary to pay attention to the side-length ratio of the rectangular charge and the specific detonation position on the end face. Furthermore, the structural response of steel plates placed at different azimuths under the blast load of a rectangular charge is preliminarily analyzed, and the results show that the deformation and energy of the plates are consistent with the distribution of the blast load. These analysis results provide a reference for the explosion protection design in near-field air explosions.

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来源期刊
Acta Mechanica Sinica
Acta Mechanica Sinica 物理-工程:机械
CiteScore
5.60
自引率
20.00%
发文量
1807
审稿时长
4 months
期刊介绍: Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences. Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences. In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest. Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics
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