EXPERIMENTAL STUDY ON EFFECTIVENESS AND MECHANISM OF ANTI-OSCILLATION TANKS AGAINST MOTION OF FLOATING CAISSON

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  • 浮遊ケーソンの動揺に対する減揺タンクの有効性と減揺メカニズムに関する実験的研究

Abstract

<p> The effectiveness and mechanism of flume-type anti-oscillation tanks against the motion of a floating caisson under regular waves was investigated from hydraulic experiments. From experimental results, it was found that the amplitude of heave was little affected by free water filled in the anti-oscillation tanks. In contrast, the maximum value of the amplitude of pitch tended to decrease with an increase in the mass of free water. From anti-oscillation moment due to free water estimated from image analysis, it was revealed that gravitational force due to the free water accounted for a substantial fraction of the anti-oscillation moment, while horizontal inertia force had an effect of increasing the amplitude of the anti-oscillation moment. Furthermore, analytical solutions of the amplitude of pitch estimated from the anti-oscillation moment agreed reasonably well with experimental results. This suggested that the mechanism of anti-oscillation tanks can be explained in the same way as in the field of naval architecture.</p>

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