Diffraction Attenuation Distribution of Underwater Explosion Shock Waves on the Surface of a Cylindrical Structure

ZHANG Di-zhou; HE Zhen-hong; HE Xin-yi; LI Ying; LU Jun; CHEN Shuang

doi:10.11993/j.issn.2096-3920.2022.03.013

Volume 30 Issue 3

Jul 2022

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Article Navigation > Journal of Unmanned Undersea Systems > 2022 > 30(3): 371-377

ZHANG Di-zhou, HE Zhen-hong, HE Xin-yi, LI Ying, LU Jun, CHEN Shuang. Diffraction Attenuation Distribution of Underwater Explosion Shock Waves on the Surface of a Cylindrical Structure[J]. Journal of Unmanned Undersea Systems, 2022, 30(3): 371-377. doi: 10.11993/j.issn.2096-3920.2022.03.013

Citation:

ZHANG Di-zhou, HE Zhen-hong, HE Xin-yi, LI Ying, LU Jun, CHEN Shuang. Diffraction Attenuation Distribution of Underwater Explosion Shock Waves on the Surface of a Cylindrical Structure[J]. Journal of Unmanned Undersea Systems, 2022, 30(3): 371-377. doi: 10.11993/j.issn.2096-3920.2022.03.013

Citation:

ZHANG Di-zhou, HE Zhen-hong, HE Xin-yi, LI Ying, LU Jun, CHEN Shuang. Diffraction Attenuation Distribution of Underwater Explosion Shock Waves on the Surface of a Cylindrical Structure[J]. Journal of Unmanned Undersea Systems, 2022, 30(3): 371-377. doi: 10.11993/j.issn.2096-3920.2022.03.013

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Diffraction Attenuation Distribution of Underwater Explosion Shock Waves on the Surface of a Cylindrical Structure

doi: 10.11993/j.issn.2096-3920.2022.03.013

1.
Naval Research Institute, Beijing 100161
2.
State Key Laboratory of Explosion Science and Technology, Beijing University of Technology, Beijing 100081

Received Date: 2022-03-29
Rev Recd Date: 2022-05-08

Available Online: 2022-06-27

Abstract

Abstract

When an underwater explosion shock wave acts on the surface of a cylindrical shell, a shock wave forms on the backshock surface in addition to the reflected shock wave. To study the diffraction distribution features of shock wave pressure on the surface of a cylindrical shell, the coupled Eulerian-Lagrangian method in the ABAQUS soft ware is used to simulate the interactions of underwater explosion shock waves and cylindrical shell structures. The pressure field distribution around a cylindrical shell is obtained. The influence of different blast distances and charges of TNT on the diffraction effect of shock wave attenuation is analyzed. The results indicate that the peak pressure and impulse of shock waves decay rapidly in front of the blast surface. With a decrease in blast distance, the angle required for attenuation to 50% decreases and the attenuation speed increases significantly. However, the charge of TNT has little effect on the peak pressure and impulse attenuation of shock waves.
- underwater explosion,
- cylindrical shell,
- shock wave,
- diffraction

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References(13)

References

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