摘要
为进行多点云雾协同爆轰荷载特性的研究,通过数值模拟与试验设计,对三点云雾爆轰超压场的波形特征进行了研究,根据超压场的波形特征进行分区,进而分析各分区的荷载特性,对12 m处的超压和冲量进行研究,发现多点云雾协同爆轰的超压峰值场和冲量场在各分区并不统一。在云雾总质量不变的条件下,对单点云雾爆轰和多点云雾爆轰的超压场和冲量场进行分析,证明了总质量相同的条件下多点云雾爆轰对人员和软目标破坏效应的范围大于单点云雾爆轰,为军事及工业生产领域的安全防护提供了指导。
This study investigates the loading characteristics of multi-point cloud and fog detonations by combining numerical simulations with experimental methods.Numerical simulations were conducted using the finite element software AUTODYN to model the explosive process and simulate the evolution of the pressure field at different time intervals.Experimental tests were also performed,with pressure sensors placed at various distances,to validate the accuracy of the numerical model.The study focuses on a three-point cloud and fog detonation scenario,analyzing the overpressure field and impulse distribution to investigate the effects of shock wave interactions.The overpressure field is systematically categorized into regions based on waveform characteristics.Key parameters,including peak overpressure,impulse,and spatial distribution patterns,are analyzed in detail.By evaluating overpressure and impulse at a height of 12 meters,the study found substantial spatial variability in both peak overpressure and impulse fields among different regions.Specifically,areas near the detonation centers experienced pressure amplification from shock wave constructive interference,whereas peripheral regions displayed intricate wave reflections and attenuation.The study also reveals that,in multi-point cloud and fog detonations,the interaction of multiple shock waves results in more efficient energy distribution,thereby increasing the destructive impact on targets.Furthermore,a comparative analysis of single-point and multi-point cloud and fog detonations with equivalent total mass shows that multi-point detonations generate a significantly larger damage radius,especially for personnel and soft targets.This heightened destructive effect is attributed to the synergistic interaction of shock waves and the redistribution of blast energy.The findings offer a deeper understanding of the spatial distribution of blast loads in multi-point cloud detonations and elucidate the mechanisms underlying the interactions of cloud detonations.These results not only provide theoretical guidance for safety measures in military and industrial applications but also suggest avenues for future research aimed at optimizing strategies to mitigate blast effects.
作者
王仲琦
孟令辉
牛江宇
周沈楠
曾令辉
WANG Zhongqi;MENG Linghui;NIU Jiangyu;ZHOU Shennan;ZENG Linghui(State Key Laboratory of Explosion Science and Safety Protection,Beijing Institute of Technology,Beijing 100081,China;Yangtze Delta Region Academy of Beijing Institute of Technology,Jiaxing 314000,Zhejiang,China)
出处
《安全与环境学报》
北大核心
2025年第7期2525-2533,共9页
Journal of Safety and Environment
基金
国家重点研发计划项目(2021YFC3001204)
陕西省重点研发计划项目(2022GY-025)
陕西省重点研发计划项目(2023-ZDLGY-11)。
关键词
安全工程
云雾爆轰
破坏效应
超压场
数值模拟
safety engineering
cloud and fog detonation
damage effect
overpressure field
numerical simulation
作者简介
王仲琦,副教授,博士,博士生导师,从事爆炸建模理论与安全性分析研究,czqwang@bit.edu.cn。
