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Bank effect
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Bank effect : ウィキペディア英語版
Bank effect

Bank effect refers to the tendency of the stern of a ship to swing toward the near bank when operating in a river or constricted waterway.
The asymmetric flow around a ship induced by the vicinity of banks causes pressure differences (Bernoulli's principle) between port and starboard sides. As a result, a lateral force will act on the ship, mostly directed towards the closest bank, as well as a yawing moment pushing her bow towards the centre of the waterway. The squat effect increases due to the decreased blockage.
This can be seen on this footage (video bank effects ) taken during model tests in a towing tank
This phenomenon depends on many parameters, such as bank shape, water depth, ship-bank distance, ship properties, ship speed and propeller action. A reliable estimation of bank effects is important for determining the limiting conditions in which a ship can safely navigate a waterway.
This phenomenon has several different names, including bank suction, bank cushion, stern suction, and ship-bank interaction.



抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Bank effect」の詳細全文を読む



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