Damage effects of caisson gravity wharf under underwater explosion

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

doi:10.11883/bzycj-2018-0090

Volume 39 Issue 6

Jun. 2019

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DONG Qi, WEI Zhuobin, TANG Ting, LI Lingfeng, LIU Jinghan. Damage effects of caisson gravity wharf under underwater explosion[J]. Explosion And Shock Waves, 2019, 39(6): 065101. doi: 10.11883/bzycj-2018-0090

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Damage effects of caisson gravity wharf under underwater explosion

doi: 10.11883/bzycj-2018-0090

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

1.
College of Warship and Ocean, Naval University of Engineering, Wuhan 430033, Hubei, China
2.
Naval Logistics Collage of PLA, Tianjin 300450, China

Received Date: 2018-03-21
Rev Recd Date: 2018-05-09

Available Online: 2019-04-25

Publish Date: 2019-06-01

Abstract

Abstract

Through the experimental study on the damage effect of underwater explosion on caisson gravity wharf model under different explosion distances, data collection and analysis for underwater loads and model damage are conducted, a study on damage factors, damage modes and damage mechanisms is developed, and the impact of explosion distance is initially discussed. The results show that the complete bubble pulsation process is not formed. Load overpressure mainly occurrs during the propagation stage of shock wave; explosive shock wave, reflected bottom wave and reflected sidewall wave are main damage factors; underwater explosions causes the damage with serious damage effectiveness, multiple modes and complex mechanisms to the caisson gravity wharf, and the major damage parts are exterior wall of explsion faces, proximal pipe trenche, cabin-sealing covers and face plate; the closer the explosion distance, the more serious the structural damage; however, when the explosion distance is too close, the explosion energy is mostly absorbed by the structural distortion of the blasting surface, so the growth on the severity of the explsive-side exterior wall’s damage increases significantly and the growth on the severity of other parts’ damage slows down.
- underwater explosion,
- caisson gravity wharf,
- damage effect,
- explosion distance

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References(20)

References

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