为深入探讨不同来流角度下三棱柱振子流致振动响应机理，本文基于二维数值计算方法和剪切压力传输SST k-ω湍流模型，利用Fluent软件自定义函数对数值模型进行二次开发，构建三棱柱流固耦合数值分析模型，实现三棱柱流致振动响应的精准预测，在此基础上分析振子截面几何特征和来流角度对结构振动响应及流场演变规律。研究结果表明，三棱柱的振动响应与振动激励机制相比圆柱更加复杂，且来流角度对三棱柱流致振动响应幅值和振动分支模式影响显著。当来流角度为30°、45°及90°时发生高频高振幅的振动模式；当来流角度为0°时表现为低频高幅的驰振特性，此时攻角变化导致升力失稳是其诱发驰振的主要原因；当来流角度为60°时三棱柱振动幅值则显著降低，表现出类似涡激振动的响应特性。
In order to further explore the flow-induced vibration response mechanism of triangular prism oscillator under different inflow angles, based on the two-dimensional numerical calculation method and the SST k-ω turbulence model of shear pressure transport, the numerical model was redeveloped by using the custom function of Fluent software, and the numerical analysis model of fluid-solid coupling for triangular prism was constructed to realize the accurate prediction of the flow-induced vibration response for triangular prism. On this basis, the geometric characteristics of oscillator cross section, the evolution law of the flow field on the structural vibration response and flow field were analyzed. The results show that the vibration response of triangular prism is more complex than that of cylinder, and the inflow angle has a significant effect on the amplitude of the response and the branching mode. The vibration mode of high frequency and high amplitude occurs when the inflow angle is 30°, 45° and 90°; when the incoming flow angle is 0°, the galloping characteristic is low frequency and high amplitude, and the main reason of galloping is the lift instability caused by the change of attack angle. When the inflow angle is 60°, the vibration amplitude of triangular prism decreases significantly, showing a response characteristic similar to that of vortex-induced vibration.
2025,47(16): 46-53 收稿日期：2024-11-4
DOI：10.3404/j.issn.1672-7649.2025.16.008
分类号：TK7；O327
基金项目：国家自然科学基金-青年科学基金项目（52301355）；青岛市自然科学基金（23-2-1-108-zyyd-jch，25-1-1-71-zyyd-jch）；自主创新科研计划项目（理工科）-青年基金（23CX06008A）
作者简介：王阳阳(1990-),男,博士,讲师,研究方向为海洋结构与流致振动
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