Chinese Journal of Ship Research, Volume. 17, Issue 2, 81(2022)

Numerical simulation analysis of liquid sloshing in tank under random excitation

Shengchao JIANG1, Bo XU2, and Zihao WANG1
Author Affiliations
  • 1School of Naval Architecture Engineering, Dalian University of Technology, Dalian 116024, China
  • 2Marine Design and Research Institute of China, Shanghai 200011, China
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    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.

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    Shengchao JIANG, Bo XU, Zihao WANG. Numerical simulation analysis of liquid sloshing in tank under random excitation[J]. Chinese Journal of Ship Research, 2022, 17(2): 81

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    Paper Information

    Category: Ship Design and Performance

    Received: Nov. 15, 2020

    Accepted: --

    Published Online: Mar. 24, 2025

    The Author Email:

    DOI:10.19693/j.issn.1673-3185.02183

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