Numerical simulation analysis of liquid sloshing in tank under random excitation

JIANG Shengchao; XU Bo; WANG Zihao

doi:10.19693/j.issn.1673-3185.02183

Volume 17 Issue 2

Apr. 2022

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Article Navigation > Chinese Journal of Ship Research > 2022 > 17(2): 81-90

JIANG S C, XU B, WANG Z H. Numerical simulation analysis of liquid sloshing in tank under random excitation[J]. Chinese Journal of Ship Research, 2022, 17(2): 81–90 doi: 10.19693/j.issn.1673-3185.02183

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Numerical simulation analysis of liquid sloshing in tank under random excitation

doi: 10.19693/j.issn.1673-3185.02183

JIANG Shengchao^{1
,
,},
XU Bo^2
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WANG Zihao^1
,

1.
School of Naval Architecture Engineering, Dalian University of Technology, Dalian 116024, China
2.
Marine Design and Research Institute of China, Shanghai 200011, China

Received Date: 2020-11-15
Rev Recd Date: 2021-03-05

Available Online: 2022-03-29

Publish Date: 2022-04-20

Abstract

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives This paper studies the transient effects, different frequencies of spectral peaks and meaningful excitation amplitudes on liquid sloshing. Methods A numerical model is established using the computational fluid dynamics (CFD) method, and the reliability of the numerical model is validated through comparison with the analytical solution of linear potential flow and experimental data. Results The transient effects of random excitation have a significant influence on the fluctuation of the free water surface of liquid sloshing in the tank. By applying the buffer function, stable results can be obtained quickly. When the peak frequency of the excitation spectrum is close to the natural frequency of the tank, the energy of the wave-height response spectrum of the liquid sloshing in the tank is mainly concentrated at the natural frequency of the tank. When the peak frequency of the excitation spectrum is far from the natural frequency of the tank, the energy of the wave-height response spectrum is concentrated near the peak frequency. With the increase of the meaningful amplitude of the excitation spectrum, the amplitude deviation of the liquid sloshing response relative to the linear wave (the deviation degree is zero) increases, and the nonlinearity of the tank increases significantly. Conclusions For the random excitation simulation, especially when the excitation frequency is far from the natural frequency, it is necessary to buffer the excitation duration. It is found that when the peak frequency of the excitation spectrum moves away from the first natural frequency to higher frequencies, the energy is dominant at the i-th order of the natural frequency when the peak frequency is close to it.
- liquid sloshing,
- random excitation,
- transient effect,
- numerical simulation

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References

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