长持时爆炸冲击波产生方法

师燕超; 杨森; 崔健; 闫攀运

doi:10.11835/j.issn.2096-6717.2021.137

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长持时爆炸冲击波产生方法

工程结构抗爆及防护 | 更新时间：2023-06-25

- 长持时爆炸冲击波产生方法
- Method for production of long duration blast wave
- 土木与环境工程学报 2023年45卷第1期页码：35-43
- 作者机构：
  
  1.天津大学，滨海土木工程结构与安全教育部重点实验室，天津 300350
  2.天津大学，建筑工程学院，天津 300350
  3.北京航天发射技术研究所，北京 100076
- 作者简介：
  
  师燕超（1982- ），男，博士，教授，主要从事建筑结构抗爆分析与设计研究，E-mail：yanchaoshi@tju.edu.cn。
  崔健（通信作者），男，博士，副教授，E-mail：jian.cui@tju.edu.cn。
- 基金信息：
  
  国家自然科学基金(51878445;51908405)
- DOI：10.11835/j.issn.2096-6717.2021.137
  中图分类号： O384
- 收稿：2021-03-16，
  
  纸质出版：2023-02-25
- 稿件说明：
移动端阅览
师燕超, 杨森, 崔健, 等. 长持时爆炸冲击波产生方法[J]. 土木与环境工程学报, 2023,45(1):35-43.

SHI Yanchao, YANG Sen, CUI Jian, et al. Method for production of long duration blast wave[J]. Journal of Civil and Environmental Engineering, 2023, 45(1): 35-43.
师燕超, 杨森, 崔健, 等. 长持时爆炸冲击波产生方法[J]. 土木与环境工程学报, 2023,45(1):35-43. DOI： 10.11835/j.issn.2096-6717.2021.137.

SHI Yanchao, YANG Sen, CUI Jian, et al. Method for production of long duration blast wave[J]. Journal of Civil and Environmental Engineering, 2023, 45(1): 35-43. DOI： 10.11835/j.issn.2096-6717.2021.137.

摘要

不同持时的爆炸冲击波对建筑结构及防护工程的作用显著不同，在试验或数值模拟中常需要得到长持时爆炸冲击波，延长爆炸冲击波正压作用时间是研究长持时爆炸荷载下结构响应的难点。在AUTODYN中建立长筒爆室小当量炸药多点延时起爆模型，分析爆炸冲击波在长筒爆室中的传播规律，研究管道长度、延时起爆时差、起爆顺序对冲击波波形的影响。结果表明：距离增加，超压峰值减小、正压持续时间增加；根据炸药量和爆室长度合理地选择起爆时差可以获得波形丰满且连续衰减的超压时程曲线；爆室底部起爆、合理控制延时间隔，可以形成类似于大当量远距离爆炸下产生的连续衰减的长持时冲击波。分别给出100、200 ms爆炸持时起爆方案，为长持时爆炸模拟装置的设计提供技术支持。

Abstract

The effect of blast wave with different duration on building structure and protection engineering are obviously different

long duration blast wave is generally essential in experimental studies and numerical simulations. However

it is difficult to prolong the duration of the positive pressure in the practice experiment of studying the structural responses under long duration blast load. A multi-point delayed detonation model with multiple small charge TNT explosives in a long tube explosion chamber is established by computational fluid dynamics software AUTODYN. The propagation law of blast wave in the long tube is analyzed. On this basis

the influences of length of explosion chamber

the delay detonation time and the initiation sequence on the blast wave form are further investigated. The results show that

as the distance increases

the peak value of overpressure decreases and the duration of positive pressure increases. The overpressure time-history curve with full and continuous attenuation of the wave form can be obtained by selecting the delay detonation time rationally according to the amount of explosive and the length of the explosion chamber. Detonating from the bottom of the explosion chamber and controlling the delay detonation time interval reasonably can form a long-duration blast wave which is equivalent with the continuous attenuation produced by a large equivalent charge long distance explosion. The parameters such as the length of explosion chamber

amount of explosive and delay detonation time are adjusted repeatedly

and the detonation schemes of 100 ms explosion duration and 200 ms explosion duration are provided

providing technical support for design of long duration explosion simulation device.

关键词

Keywords

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