| 陈俊毅, 王岗, 付睿丽, 陶爱峰, 杨子原.剪切流引发港口共振的数值模拟研究[J].海洋工程,2025,(2):196~202 |
| 剪切流引发港口共振的数值模拟研究 |
| Numerical simulation study on harbor resonance induced by shear flow |
| 投稿时间：2024-05-27 |
| DOI：10.16483/j.issn.1005-9865.2025.02.019 |
| 中文关键词: 港口振荡 数值模拟 剪切流 NHWAVE |
| 英文关键词:harbor oscillation numerical simulation shear flow NHWAVE |
| 基金项目:江苏省自然科学基金资助项目（BK20220082）；国家自然科学基金资助项目（52201319） |
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| 中文摘要: |
| 如同空气吹过风琴引起其管内空气共振，流速较强的剪切流经过港口时也可能引发港口水面发生共振现象。Fabrikant从理论上给出了引发不同港口共振模态的剪切流流速解析解，但从未得到物理模型试验或数值模拟的验证。为此，基于NHWAVE数值模型，模拟不同剪切流引发的港口波动现象，检验Fabrikant所提理论的正确性。结果表明，剪切流抵达港口后将引发低模态水波共振，且共振波幅随着时间快速衰减。港内的最大振幅随着剪切流流速增大而增大，振荡持续时间随着剪切流流速增大而减小。在Fabrikant理论预测可引发港口共振的剪切流流速条件下，并未出现持续的港口共振现象。因此，文中的研究证实任意流速的剪切流均可引发港口共振，但该共振是瞬态的，其波幅随时间快速衰减。 |
| 英文摘要: |
| Similar to the resonance of air inside an organ pipe induced by air blown through it, strong shear flows passing through harbors may also cause resonance on the water surface. Fabrikant theoretically provided analytical solutions of shear flow velocities that can trigger various resonance modes in harbors, but this theory has never been validated through physical model tests or numerical simulations. To this end, based on the NHWAVE numerical model, this study simulates harbor wave phenomena induced by different shear flows and verifies the correctness of Fabrikant's theoretical predictions. The results indicate that after the shear flow reaches the harbor, low-mode water wave resonance is triggered, and the amplitude of the resonance rapidly decays over time. The maximum amplitude within the harbor increases with the shear flow velocity, while the duration of oscillation decreases with increasing shear flow velocity. Under the shear flow velocity conditions predicted by Fabrikant's theory to cause harbor resonance, sustained harbor resonance phenomena were not observed. Therefore, this study confirms that shear flows of any velocity can trigger harbor resonance, but this resonance is transient, and its amplitude rapidly decays over time. |
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