Experimental Study For Motion Response Of Liquid Loads On Ship Models

As ships sail in the sea, roll, heave and pitch motions of ships happen. These motions, which correlate closely the safety of ships, are affected intensely by different loading modes. In terms of ships loading solid cargo, the effect of loading mode can be predicted by using theoretic methods or numerical methods. However, in terms of loading liquid cargo, the liquid sloshing arises from ship motions. So far, a lot of scholars investigating liquid sloshing focus on ship structures' damage due to this sloshing and has achieved outstanding consequences, but few of them investigate the effect of liquid sloshing on ship motions. This thesis focuses on the effect of liquid sloshing on ship motions and the dissimilarities between effects of liquid sloshing and effects of solid cargo. As ships carry liquid cargo, the liquid sloshing in cabins and ship motion constitutes a complex interaction system, which is too difficult to design a completely appropriate theoretical model to simulate the effect of liquid sloshing on ship's motion. Therefore, this thesis practically investigates the effect of liquid sloshing on ship model by using experimental method. This model consists six cabins that are same in shape and its dimension is 1.5×2.5×0.147 (m) . This experiment respectively investigates motions of ship model carrying sand and water, which is same in mass, in order to analysis the effect of liquid sloshing. The results show that the effect of liquid sloshing on ship's motion is definitely different from that of solid cargo. Finally, the author presents unsolved problems which need to be investigated further.