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Experimental studies on the slowly varying drift motion of a berthed container ship model

机译：停泊的集装箱船模型的缓慢变化漂移运动的实验研究

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The effects of free-surface waves on the floating structures are of great importance in the offshore industry. Among the six degrees of motions of a surface ship the absence of restoring forces in surge, sway and yaw led to critical situations for moored ships in the recent times. The order of forces in horizontal plane and their exciting frequencies are matters of interest. The resonance with the presence of moored chains led to many accidents in the recent past. The lines in dry conditions may not give good damping and in wet condition they may trigger the system to chaotic motions and jumps. Two different loading conditions of a container ship model are tested with waves in laboratory conditions in two different drafts. The mooring lines are chosen as per scale law and the energy under the response spectrum is determined from the plots. The results give new insights into the movement of a berthed ships subjected to waves. Response of the moored ship to different loading conditions in different water depths are discussed in this paper. The paper gives the order of energy due to first-order and slowly varying movement of a berthed container model in a towing tank.
机译：自由表面波对浮动结构的影响在海上工业中非常重要。在水面舰船的六个运动度中，由于浪涌，摇摆和偏航的恢复力的缺乏，导致近来停泊船舶的严重状况。在水平面中的力的阶数及其激发频率是令人关注的问题。系泊链的存在引起的共鸣在最近导致了许多事故。干燥条件下的管线可能无法提供良好的阻尼，而在潮湿条件下，它们可能会触发系统混乱的运动和跳跃。在两种不同吃水深度下，在实验室条件下用波浪测试了集装箱船模型的两种不同装载条件。根据比例定律选择系泊缆，并根据曲线确定响应谱下的能量。结果为遭受波浪停泊的船舶的运动提供了新的见解。本文讨论了系泊船在不同水深下对不同载荷条件的响应。本文给出了由于拖曳罐中停泊的容器模型的一阶且缓慢变化的运动而产生的能量顺序。

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