Analysis of internal load and dynamic response of vacuum explosion containment vessel with sand covered for explosive welding

ZHOU Dezheng; LI Xiaojie; WANG Xiaohong; WANG Yuxin; YAN Honghao

doi:10.11883/bzycj-2023-0455

Volume 44 Issue 10

Oct. 2024

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ZHOU Dezheng, LI Xiaojie, WANG Xiaohong, WANG Yuxin, YAN Honghao. Analysis of internal load and dynamic response of vacuum explosion containment vessel with sand covered for explosive welding[J]. Explosion And Shock Waves, 2024, 44(10): 101407. doi: 10.11883/bzycj-2023-0455

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Analysis of internal load and dynamic response of vacuum explosion containment vessel with sand covered for explosive welding

doi: 10.11883/bzycj-2023-0455

ZHOU Dezheng^1
,,
LI Xiaojie^{1, 2
,
,},
WANG Xiaohong^{1, 2},
WANG Yuxin^{1, 2},
YAN Honghao^{1, 2}

1.
School of Mechanics and Aerospace Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
2.
State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, Dalian 116024, Liaoning, China

Received Date: 2023-12-09
Rev Recd Date: 2024-05-27

Available Online: 2024-05-28

Publish Date: 2024-10-30

Abstract

Abstract

Explosive welding production in a vacuum explosion containment vessel can not only restrict the shock wave and noise generated by explosive explosion in a certain space range, but also effectively improve the quality of explosive welding products. Meanwhile, it also alleviates the problems of unstable product quality and rainy season shutdown caused by the influence of weather and climate during explosive welding production, which is an invention that can promote the development of the explosive processing industry. In order to develop a super large vacuum explosion containment vessel for explosive welding, it is necessary to explore the internal blast load and dynamic response of vacuum explosion containment vessel with sand covered for explosive welding. In order to meet the requirements of the experiment, a 0.55 m³ small cylindrical vacuum explosion containment vessel with the cap covered by a certain thickness of sand was designed, and a series of vacuum explosion experiments were carried out in it. At the same time, using the AUTODYN finite element analysis program, the numerical simulation analysis of the corresponding experimental groups is carried out. The evolution of shock wave inside the container, the distribution of blast load, the dynamic response of the structure, and the mechanism of sand covering on the end of the container on the damping of the plate structure are explored in depth. By analyzing the results of experiment and numerical simulation, it is concluded that the peak value of the second impulse of the time-history curve of the blast load in the explosion containment vessel is obviously higher than that of the first impulse, and the superposition and reflection of the shock wave always occur in the inner wall of the cover. With the decrease of vacuum degree inside the container, the peak value of the blast load is weakened obviously. According to the time-history curves of blast load and dynamic strain calculated by the numerical simulation, the dynamic response of the container cover is divided into four development phases: step-up phase, impulse follower phase, inertial lag phase and static pressure stabilization phase. With the decrease of vacuum degree, the amplitude of dynamic response is weakened obviously. With the increase of the thickness of sand cover, the dynamic response of explosion vessel is gradually weakened. Ultimately, it is concluded that reducing the environmental pressure inside the vessel and increasing the thickness of the sand covered on the cap of the container can be used as an effective method to reduce the forced vibration of the explosion containment vessel. The conclusions of the study are useful for the structural design of super large vacuum explosion containment vessels.
- vacuum explosion containment vessel,
- blast load,
- dynamic response,
- shock wave,
- vacuum degree,
- sand covering

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References(11)

References

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