详情

原文传递 Mini-Tsunami Made by Ship Moving Across a Depth Change

题名：	Mini-Tsunami Made by Ship Moving Across a Depth Change
正文语种：	英文
作者：	John Grue
作者单位：	Univ, of Oslo
摘要：	A ship moving across a shallow depth change, in water in a small or narrow space, may create a small tsunami, 0.5-1 km long, observed as a harbor wave on shore, where a wave height up to 1.4 m has been measured. The paper gives an interpretation of the generation process of this new phenomenon. At a depth change, the ship-induced fluid velocity produces a reaction velocity of equal magnitude and opposite direction, orthogonal to the bottom. This velocity appears as a vertical velocity at the water surface, making the waves. The waves propagate with the shallow water speed upstream of a ship moving at subcritical speed. Theory and numerical calculations for a real ship geometry are compared with a moving pressure distribution. Computations compare favorably with a few available wave height measurements.
出版日期：	2020.09-10
出版年：	2020
期刊名称：	Journal of Waterway, Port, Coastal, and Ocean Engineering
卷：	Vol.146
期：	No.05
页码：	04020023