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Ship Structure and Fittings | Publishing Language: Chinese

Influence of the liquid-phase equation of state on the implosion characteristics of deep-sea ceramic pressure hulls

Tong LI1,2,3, Shengxia SUN1,2,3, Jiancai ZHENG1,2,3, Min ZHAO1,2,3( )
School of Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
State Key Laboratory of Submarine Geoscience, Shanghai Jiao Tong University, Shanghai 200240, China
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Abstract

Objective

To address the problem of implosion of deep-sea ceramic pressure hulls at depths of 10 000 meters, this study investigates the influence of different liquid-phase equations of state (EoS) on the implosion characteristics of deep-sea ceramic pressure hulls.

Method

Based on compressible multi-phase flow theory and the adaptive mesh refinement (AMR) method, a numerical simulation approach is developed for modeling the implosion of deep-sea ceramic pressure hulls with various liquid-phase equations of state. This method enables refined shockwave capture during implosion and provides an accurate description of shockwave load attenuation characteristics.

Results

The type of liquid-phase equation of state has a significant influence on the implosion shockwave load characteristics. At the radius measurement location, the peak pressure and wave velocity of the implosion shock wave calculated using the NASG liquid-phase equation of state were 11.29% and 0.88% lower, respectively, than those obtained with the SG liquid-phase equation of state. When using the MNASG liquid-phase equation of state, the corresponding reductions were 13.78% and 4.73%, respectively, compared with the SG liquid-phase equation of state.

Conclusion

Employing different liquid-phase equations of state to describe the extreme flow field environments of deep-sea implosions provide a new reference for shockwave load prediction and offers guidance for underwater implosion protection.

Keywords

ceramic pressure hulldeep-seaunderwater implosionequation of statecompressible multiphase flowshock-wave loadnumerical simulation
CLC number: U674.941 Document code: A

References

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Chinese Journal of Ship Research
Volume 21 Issue 5,
October 2026
Pages 131-145
DOI: 10.19693/j.issn.1673-3185.04579

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Cite this article:
LI T, SUN S, ZHENG J, et al. Influence of the liquid-phase equation of state on the implosion characteristics of deep-sea ceramic pressure hulls. Chinese Journal of Ship Research, 2026, 21(5): 131-145. https://doi.org/10.19693/j.issn.1673-3185.04579

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Received: 27 June 2025
Revised: 10 July 2025
Published: 18 September 2025
© 2026 Chinese Journal of Ship Research.