Experimental Study of Three-Dimensional Swirling Sloshing of Free Surface in Vertical Cylindrical Tank

doi:10.16183/j.cnki.jsjtu.2023.082

Abstract

Abstract:

Considering that the research on resonant three-dimensional swirling waves in vertical cylindrical tanks is relatively rare, this paper has built a set of tank sloshing model test device to study the first-mode and second-mode resonant three-dimensional swirling waves in vertical cylindrical tanks. It is found that when the external excitation frequency is equal to the first mode natural frequency of the free surface movement, three typical waveforms, planar wave, breaking wave, and swirling wave, appear in the cylindrical tank. When the external excitation frequency is close to the first mode natural frequency of the free surface movement, the modulation wave, namely beat phenomenon, appears in the cylindrical tank. When the external excitation frequency is equal to the second mode natural frequency of the free surface movement, three typical waveforms, the second mode wave, the second mode swirling wave, and the irregular wave, appear in the cylindrical tank. The research results in this paper can provide reference for offshore engineering designers to design cylindrical tanks of floating platforms.

Key words: cylindrical tank, liquid sloshing, model test, swirling wave, second-mode resonance

CLC Number:

U661.73

LIU Dongxi, MA Renjie, CAI Wenjuan, LU Tianze. Experimental Study of Three-Dimensional Swirling Sloshing of Free Surface in Vertical Cylindrical Tank[J]. Journal of Shanghai Jiao Tong University, 2024, 58(11): 1665-1673.

Figures/Tables 9

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工况	A/mm	A/R	f_e/Hz	f_e/f_n	模态
I	0.48	0.002	1.177	f_e/f₁=1.0	一阶共振
II	0.96	0.004	1.177	f_e/f₁=1.0	一阶共振
III	1.44	0.006	1.177	f_e/f₁=1.0	一阶共振
IV	1.44	0.006	1.118	f_e/f₁=0.95	一阶拍频
V	1.44	0.006	2.338	f_e/f₂=1.0	二阶共振