Scaling law of deep-sea trinitrotoluene (TNT) explosion

IF 3.8 2区工程技术 Q1 ENGINEERING, MECHANICAL

Acta Mechanica Sinica Pub Date : 2023-10-25 DOI:10.1007/s10409-023-23280-x

Junzheng Yue (, ), Xianqian Wu (, ), Chenguang Huang (, )

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引用次数: 0

Abstract

Understanding the dynamic characteristics of deep-sea explosions is essential to improve the survivability and combat capability of deep-sea equipment. In this paper, by considering the practical underwater conditions, we investigated the mechanical effects of the deep-sea 1-kg-trinitrotoluene (TNT) explosion with charge depths ranging from 1 to 10 km through numerical simulation and dimensional analysis. The shock wave overpressure, the positive overpressure pulse, the bubble pulse, and the energy distribution for various depth explosions were analyzed systematically. The simulation results showed that the charge depth was negligible for the peak overpressure of the shock wave. However, the positive overpressure pulse, the shock wave energy, the maximum bubble radius, the bubble energy, and the bubble period decrease significantly with increasing the charge depth. Then, the dimensional analysis for deep-sea TNT explosion was performed to reveal the key dimensionless parameters, from which the scaling laws of the shock wave overpressure and the overpressure pulse were obtained. By fitting the simulation results, the dimensionless equations were proposed, providing an effective method for predicting the peak overpressure and the positive overpressure pulse of shock wave for underwater TNT explosion over a wide range of water depths.

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深海三硝基甲苯（TNT）爆炸的缩放规律

了解深海爆炸的动态特性对于提高深海装备的生存能力和作战能力至关重要。本文结合水下实际条件，通过数值模拟和尺寸分析，研究了装药深度为 1 至 10 千米的 1 千克三硝基甲苯（TNT）深海爆炸的力学效应。系统分析了不同深度爆炸的冲击波超压、正超压脉冲、气泡脉冲和能量分布。模拟结果表明，装药深度对冲击波峰值超压的影响可以忽略不计。但是，随着装药深度的增加，正超压脉冲、冲击波能量、最大气泡半径、气泡能量和气泡周期都明显减小。然后，对深海 TNT 爆炸进行了尺寸分析，揭示了关键的无量纲参数，并从中得到了冲击波超压和超压脉冲的缩放规律。通过对模拟结果进行拟合，提出了无量纲方程，为预测大水深范围内水下 TNT 爆炸冲击波的峰值超压和正超压脉冲提供了有效方法。

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

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