方形结构由于存在几何棱角，在来流作用下会发生复杂的振动响应，是流致振动能量收集的理想结构。本文针对方柱流致振动开展数值模拟研究，分析不同来流角度下柱体的流致振动类型，揭示截面几何特征、来流角度对柱体振动响应、流体力及相位变化、尾流结构的影响。研究结果表明，来流角度是影响方柱振动响应和振动模式的重要因素，当来流角度为0°时，方柱会产生驰振响应，尾流结构发生斜向偏移且周期内漩涡脱落丰富，导致柱体呈低频高幅振动；来流角度在15°≤θ≤30°时，方柱产生涡激振动与驰振耦合的振动响应，来流角度为45°时，方柱发生涡激振动响应；从能量俘获角度，控制来流角度使方柱发生驰振响应，从而实现大范围流速下的海洋能量汲取。
Due to the presence of geometric edges and corners, the square structure exhibits a complex vibration response when subjected to incoming flow, making it an ideal structure for collecting flow-induced vibration energy. This paper presents a numerical simulation study on the flow-induced vibration of a square cylinder, analyzing the various types of cylinder vibrations under different incoming flow angles and revealing the effects of section geometry and inflow angle on vibration response, fluid force, phase change, and wake structure. The results demonstrate that the inflow angle plays a crucial role in determining both the vibration response and mode of the square cylinder. When the Angle of incoming flow is 0°, the square cylinder will produce galloping response, and the wake structure will be inclined to shift and the vortex shedding is abundant in the period, resulting in low frequency and high amplitude vibration of the square cylinder. When the incoming flow Angle is 15°≤θ ≤30°, vortex-induced vibration and galloping coupling vibration response of the square cylinder occurs. When the incoming flow Angle is 45°, vortex-induced vibrations are observed in the square cylinder. By controlling the incoming flow angle to induce galloping responses in the square cylinder from an energy capture perspective, wide-range ocean energy absorption can be achieved.
2024,46(5): 27-33 收稿日期：2023-10-30
DOI：10.3404/j.issn.1672-7649.2024.05.005
分类号：TE7;O327
基金项目：国家自然科学基金资助项目（52301355）；青岛市自然科学基金资助项目（23-2-1-108-zyyd-jch）
作者简介：李想(1998-),女,硕士,研究方向为水下结构机械设计
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