Structural dynamical characteristics induced by vented hydrogen explosion

HAO Tengteng; WANG Changjian; YAN Wangji; REN Weixin

doi:10.11883/bzycj-2019-0412

Volume 40 Issue 6

Jun. 2020

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HAO Tengteng, WANG Changjian, YAN Wangji, REN Weixin. Structural dynamical characteristics induced by vented hydrogen explosion[J]. Explosion And Shock Waves, 2020, 40(6): 065401. doi: 10.11883/bzycj-2019-0412

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HAO Tengteng, WANG Changjian, YAN Wangji, REN Weixin. Structural dynamical characteristics induced by vented hydrogen explosion[J]. Explosion And Shock Waves, 2020, 40(6): 065401. doi: 10.11883/bzycj-2019-0412

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Structural dynamical characteristics induced by vented hydrogen explosion

doi: 10.11883/bzycj-2019-0412

1.
College of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
2.
State Key Laboratory of Internet of Things for Smart City, University of Macau, Macau 999078, China
3.
Department of Civil and Environmental Engineering, University of Macau, Macau 999078, China

Received Date: 2019-10-25
Rev Recd Date: 2020-02-18
Publish Date: 2020-06-01

Abstract

Abstract

Hydrogen is recognized as one of the most promising energies in the 21st century due to the nature of no pollution and high efficiency, unfortunately, it is likely to suffer from explosion in the process of usage. As one of the important ways of disaster, venting can effectively improve the safety and reliability of the structure under hydrogen explosion. In order to study the dynamical characteristics of the structure under vented hydrogen explosion, experimental and numerical studies were conducted in this paper. On the one hand, a number of scenarios were carried out for vented hydrogen explosion in a large-scale ISO container of 12 m×2.5 m×2.5 m to investigate the effects of hydrogen volume fraction, the position of ignition as well as the arrangement of obstacles on the structural dynamics. The characteristics of internal overpressure load and the evolution mechanism of dynamic response were analyzed. Results indicate that the structural displacements are dominated by the first overpressure peak. The trend of displacement agrees well with that of the overpressure, and there is a linear relationship between their peaks. The acceleration is dominated by high-frequency oscillations of the overpressure caused by unstable combustion. Furthermore, the peak of the displacement is significantly affected by hydrogen volume fraction and increases with the increase of hydrogen volume fraction. The peak acceleration is also affected by the ignition position, and the peak acceleration of central ignition is larger than that of back ignition. Additionally, the effects of the number of obstacles on structural dynamic response are not monotonic. On the other hand, a baseline finite element model of the structure is established based on the ambient vibration testing. The numerical simulation results agree well with those of the experimental results. Therefore, the model can be used to predict structural dynamic responses under vented hydrogen explosion.
- dynamic response,
- vented hydrogen explosion,
- overpressure load,
- baseline finite element model

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References(22)

References

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