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首页> 外文期刊>Ocean Engineering >Vortex-induced vibrations and waves of a long circular cylinder predicted using a wake oscillator model
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Vortex-induced vibrations and waves of a long circular cylinder predicted using a wake oscillator model

机译：使用尾波振荡器模型预测的涡旋振动和长圆柱的波动

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摘要

A numerical study based on a wake oscillator model was conducted to determine the response performance of vortex-induced vibration (VIV) on a long circular cylinder. The coupling equations of the structural oscillator model and wake oscillator model were solved based on a standard central finite difference method of the second order. The VIV response characteristics including VIV displacement, VIV frequency, VIV wavelength, standing waves, travelling waves, structural velocity, lift force coefficient and the transferred energy from fluid to structure with different cylinder tensions were compared. The numerical results show that as the tension increases, the VIV response amplitude and the VIV frequency have slightly deceasing and increasing tendencies, respectively. However, the VIV wavelength is obviously increased as the tension increases. The VIV response emerges as standing waves first, and then displays a mixture of standing and travelling waves. Last, the VIV response eventually transforms into travelling waves.
机译：进行了基于尾流振荡器模型的数值研究，以确定长圆柱体上的涡激振动（VIV）的响应性能。基于标准的二阶中心有限差分法，求解了结构振子模型与尾振子模型的耦合方程。比较了VIV响应特性，包括VIV位移，VIV频率，VIV波长，驻波，行波，结构速度，升力系数以及在不同气缸张力下从流体到结构的传递能量。数值结果表明，随着张力的增加，VIV响应幅度和VIV频率分别具有略微下降和上升的趋势。但是，VIV波长会随着张力的增加而明显增加。 VIV响应首先作为驻波出现，然后显示驻波和行波的混合。最后，VIV响应最终转换为行波。

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