Influence of bubbles and breaking waves on floating shock platform

WANG Zhikai; ZHOU Peng; SUN Bo; YAO Xiongliang; YANG Nana

doi:10.11883/bzycj-2018-0212

Volume 39 Issue 9

Sep. 2019

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Article Navigation > Explosion And Shock Waves > 2019 > 39(9): 093201

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WANG Zhikai, ZHOU Peng, SUN Bo, YAO Xiongliang, YANG Nana. Influence of bubbles and breaking waves on floating shock platform[J]. Explosion And Shock Waves, 2019, 39(9): 093201. doi: 10.11883/bzycj-2018-0212

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Influence of bubbles and breaking waves on floating shock platform

doi: 10.11883/bzycj-2018-0212

1.
School of Marine Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China
2.
School of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China

Received Date: 2018-06-19
Rev Recd Date: 2019-03-11

Available Online: 2019-08-25

Publish Date: 2019-09-01

Abstract

Abstract

Based on the ALE algorithm in LS-DYNA software, the numerical simulation of the pulsation process of underwater explosion near water surface is carried out and compared with the experimental results. The correctness of the finite element model and parameter setting of the near-wall hybrid boundary near the water surface is verified. The different explosion conditions are set up, and the influence of air bubbles and their broken waves on the floating shock platform is explored. The results show that during the underwater explosion, the bubble, free surface and floating shock platform will have strong coupling effect, in the bubble pulsation stage. The bubble will induce the inrush current and the water ripple effect, affecting the safety and usability of the floating shock platform; the shock wave is the main factor affecting the shock environment of the floating shock platform. Due to the low frequency of the bubble, the bubble pulsation and the water ripple on the floating shock platform The direct shock effect will increase the spectral velocity value and spectral displacement value of the shock environment of the floating shock platform to a small extent, and has almost no effect on the spectral acceleration value; the waves and bubbles formed by the water slamming water surface are broken and waved, which is caused by the floating shock platform. The excitation load is periodic with the same period as the wave period. The excitation load of the wave changes the shock environment of the platform only by exciting the floating shock platform resonance of its corresponding frequency. The wave load is small and has little shock on the shock environment of the floating shock platform.
- bubble pulsation,
- floating shock platform,
- shock environment,
- underwater explosion

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References

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