Abstract Sloshing refers to the motion of the free liquid/gas interface inside a partially filled container subjected to an external excitation with a consequent motion of the system center of gravity. Several parameters related to the fluid container, the fluid properties, the excitation levels, and the gravitational environment govern this phenomenon. Moreover, it is a significant cause of disturbance in embarked reservoirs. In this paper, it is shown that the absolute liquid/gas interface position η A during moderate sloshing (i.e., in the absence of splashing and wave breaking) can be measured over the full surface domain by the Reference Image Topography technique. It is applied to sloshing in steady and in transient regimes, underlining its potential. The simultaneous measurement of the liquid/gas interface position, in several points, has allowed us to identify swirling regimes and to evaluate the spatial distribution of fluid damping.

中文翻译：

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圆柱容器中液体晃动的模态表征和阻尼测量通过参考图像地形。

摘要 晃荡是指在外部激励作用下部分填充容器内的自由液/气界面的运动，从而导致系统重心的运动。与流体容器、流体特性、激发水平和重力环境相关的几个参数控制着这种现象。此外，它是造成已投入水库干扰的重要原因。在本文中，表明可以通过参考图像地形技术在整个表面域上测量中等晃动（即没有飞溅和波浪破碎）期间的绝对液/气界面位置 η A 。它适用于稳定和瞬态状态下的晃动，突显其潜力。液/气界面位置的同时测量，在几个点，