Damage effects of a caisson wharf subjected to underwater contact explosion

LIU Jinghan; TANG Ting; WEI Zhuobin; DONG Qi; LI Lingfeng

doi:10.11883/bzycj-2019-0378

Volume 40 Issue 11

Nov. 2020

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LIU Jinghan, TANG Ting, WEI Zhuobin, DONG Qi, LI Lingfeng. Damage effects of a caisson wharf subjected to underwater contact explosion[J]. Explosion And Shock Waves, 2020, 40(11): 111407. doi: 10.11883/bzycj-2019-0378

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LIU Jinghan, TANG Ting, WEI Zhuobin, DONG Qi, LI Lingfeng. Damage effects of a caisson wharf subjected to underwater contact explosion[J]. Explosion And Shock Waves, 2020, 40(11): 111407. doi: 10.11883/bzycj-2019-0378

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Damage effects of a caisson wharf subjected to underwater contact explosion

doi: 10.11883/bzycj-2019-0378

LIU Jinghan^{1, 2
,},
TANG Ting^{2
,
,},
WEI Zhuobin²,
DONG Qi^{1, 2},
LI Lingfeng^{1, 2}

1.
Naval University of Engineering, Wuhan 430033, Hubei, China
2.
Naval Logistics Academy, Tianjin 300450, China

Received Date: 2019-09-09
Rev Recd Date: 2019-11-20
Publish Date: 2020-11-05

Abstract

Abstract

In order to study the damage mechanism of a caisson wharf under underwater contact explosion, the damage characteristic caisson wharf subjected to underwater contact explosion was simulated by using the LS-DYNA software. The credibility of simulation results was verified by comparative analysis of experimental results. The results show that numerical simulation can reflect the experimental result effectively. The failure process of caisson wharf can be divided into two stages. The circumferential cracks and crater appear in the blast side during the shock wave propagation. During the bubble expansion stage, the detonation products flow into the caisson bin from break accelerating the deformation and damage of the caisson cage. The deformation of the cage seriously led to the damage of the wharf panel. The bubble rush out of water and collapse. Accordingly, the severest damage is stopped when it is about 14% of the first pulsation period of underwater explosion bubble. When the location of charge detonation is in the middle of water depth, underwater contact explosion causes more overall damage to the caisson. When the location of charge detonation is near water face, it causes more damage to wharf panel.
- underwater contact explosion,
- caisson wharf,
- damage effect,
- pulsation bubble,
- explosive depth

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References

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