Authors: Hayama, S.; Inoue, Y.

Source: Proceedings of IMarEST - Part A - Journal of Marine Engineering and Technology, Volume 2003, Number 2, March 2003 , pp. 54-64(11)

Publisher: IMarEST

Abstract:

As an effective antisloshing device, a reversed U-tube was employed as a dynamic damper and its suppression characteristics were studied for a cylindrical tank, theoretically and experimentally. As a result, it is confirmed that the reversed U-tube works as a dynamic damper and suppresses the resonant amplitude of sloshing to less than 1/10 of the undamped amplitudes, when the ratio of the natural frequency of sloshing to that of liquid columns in the U-tube is set nearly equal to unity. When two U-tubes are set symmetrically in a cylindrical tank in a cross formation, they can suppress resonant sloshing against the excitations in any direction. The frequency response of the surface elevation calculated by the Boundary Element Method (BEM) shows a good agreement with those obtained by the experiments.

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Document Type: Research article

Publication date: 2003-03-01

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