Mass ratio in the Governing Mechanism and Mode Classification of Granular Media Explosive Dispersal

MIAO Lülan; XUE Kun

doi:10.12382/bgxb.2025.0684

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Mass ratio in the Governing Mechanism and Mode Classification of Granular Media Explosive Dispersal

更新时间：2026-02-16

- Mass ratio in the Governing Mechanism and Mode Classification of Granular Media Explosive Dispersal
- Acta Armamentarii (2026)
- 作者机构：
  
  北京理工大学爆炸科学与技术国家重点实验室爆炸防护与应急处置技术工程教育部研究中心,北京,100081
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2025.0684
  CLC： TJ301
- Received：22 July 2025，
  
  Online First：13 February 2026，
- 稿件说明：
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缪绿兰，薛琨. 颗粒介质爆炸分散的当量比主导机制与模式划分[J/OL]. 兵工学报, 2026(2026-02-16). https://doi.org/10.12382/bgxb.2025.0684.

MIAO L, XUE K. Mass ratio in the governing mechanism and mode classification of granular media explosive dispersal[J/OL]. Acta Armamentarii, 2026(2026-02-16). https://doi.org/10.12382/bgxb.2025.0684. (in Chinese)
缪绿兰，薛琨. 颗粒介质爆炸分散的当量比主导机制与模式划分[J/OL]. 兵工学报, 2026(2026-02-16). https://doi.org/10.12382/bgxb.2025.0684. DOI：

MIAO L, XUE K. Mass ratio in the governing mechanism and mode classification of granular media explosive dispersal[J/OL]. Acta Armamentarii, 2026(2026-02-16). https://doi.org/10.12382/bgxb.2025.0684. (in Chinese) DOI：

摘要

颗粒介质的爆炸分散存在于各种尺度的系统中，对于预防、控制自然灾害及工业事故，设计、优化工程武器设备等具有重要指导价值。但是颗粒介质的爆炸分散过程的涉及复杂的多尺度、多相耦合和多重间断的特点，为相关研究带来了极大的挑战性。采用可压缩计算流体力学耦合粗化离散元方法模拟了中心高压气团驱动下具有不同结构参数的分散体系的爆炸分散行为，发现颗粒环与中心高压气团的质量比值，即当量比，是决定体系宏观分散行为的关键参数。为了将不同的宏观分散过程在统一的框架下进行评价，从工程运用的角度设计了三个相互独立的无量纲参数，将不同的宏观分散过程划分为四种模式，并提出了不同模式转变的临界当量比。

Abstract

Explosive dispersal of granular media widely occurs in various length scale systems

which is of great guiding value for preventing and controlling natural disasters and industrial accidents

designing and optimizing engineering weapons and equipment. However

explosive dispersal of granular media involves complex multi-scale

multi-phase coupling

and multiple discontinuities

which bring great challenges toitsstudy. In thiswork

the compressible computational fluid dynamics coarse-grained discrete element method is applied to simulate the explosive dispersal behavior of a series of dispersal systems with different combination of structural parameters. The particle ring is driven by central high-pressure gases. It is found that the mass ratio of the particle ring to the central high-pressure gases

that is

the mass ratio

is the key parameter determining the macroscopic dispersal behavior of the system. In order to evaluate different macro dispersal processes under a unified framework

three independent dimensionless parametersweredesigned from the perspective of engineering application

applying which various macro dispersal processes can be divided intofourdispersal modes

and the corresponding critical mass ratios were proposed.

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Keywords

references

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