Abstract

Liquid sloshing in the tank not only affects the movement of the carrier, but also easily causes structural fatigue, or even structural damage. How to effectively suppress sloshing is one of the most important issues in naval architecture and ocean engineering. In this paper, an anti-sloshing method with a movable vertical part and spring system is presented. Based on CFD and FEM, sloshing states and displacements of the movable part at different spring stiffness are numerically studied, in order to investigate dynamic response characteristics of the fluid-structure coupling system formed by the tank-fluid-part. The results illustrate that the movable part with appropriate spring stiffness can suppress the sloshing more effectively than fixed part. By analysis of the relationship between sloshing liquid movement and the part displacement, phase difference between the part displacement and the wave elevation is found to be suitable to estimate the appropriate spring stiffness of the movable part under different conditions. In addition, numerical results of free decay tests and sine sweep tests illustrate that the movable part with appropriate spring stiffness can also shift the natural frequency of the tank-fluid-part system.

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