This study proposes an alternative mass ratio definition for vortex-induced vibration (VIV) systems. The proposed definition, henceforth known as 'total mass ratio', differs from the conventionally used mass ratio definition (i.e. the ratio of the mass of the oscillating body to the mass of the displaced fluid) in that the added mass of the fluid is taken into account. Two-dimensional numerical simulations are conducted to compare the effect of mass ratio on the VIV response of two cylinders with different cross sections, namely, a fully-filled solid cylinder and a hollow cylinder with fluid-filled cavities; both are designed to generate identical flow characteristics. When plotted against the conventional mass ratio, VIV response amplitudes of the fully-filled and hollow cylinders are different despite the similarity in flow characteristics. Conversely, the trends of VIV response amplitude against total mass ratio for both cylinders overlap almost perfectly. Results therefore s...

中文翻译：

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涡激振动系统的质量比定义，并增加了质量考虑

这项研究提出了涡流振动（VIV）系统的替代质量比定义。所提出的定义，此后称为“总质量比”，与常规使用的质量比定义（即，振荡体的质量与被驱替的流体的质量之比）不同，在于采用了流体的总质量考虑在内。进行了二维数值模拟，比较了质量比对两个横截面不同的圆柱体，即完全填充的实心圆柱体和带有流体填充腔的空心圆柱体的VIV响应的影响；两者均旨在产生相同的流动特性。对照常规质量比进行绘制时，尽管流动特性相似，但完全填充和中空圆柱的VIV响应幅度是不同的。相反，两个气缸的VIV响应幅度相对于总质量比的趋势几乎完全重叠。结果因此...