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首页> 外文期刊>Bulletin of the American Physical Society >APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Ship wakes and spectrograms: mathematical modelling and experimental data for finite-depth flows
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APS -70th Annual Meeting of the APS Division of Fluid Dynamics- Event - Ship wakes and spectrograms: mathematical modelling and experimental data for finite-depth flows

机译：APS -70TH流体动力学APS划分的年会 - 船舶扫描和谱图：有限深度流动的数学建模与实验数据

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We are concerned with how properties of a ship wake can be extracted from surface height data collected at a single point as the ship travels past. The tool we use is a spectrogram, which is a heat map that visualises the time-dependent frequency spectrum of the surface height signal. In this talk, the focus will be on presenting the theoretical framework which involves an idealised mathematical model with a pressure distribution applied to the surface. A geometric argument based on linear water wave theory provides encouraging results for both subcritical and supercritical flow regimes. We then summarise some recent findings obtained by comparing our analysis to experimental data collected at the Australian Maritime College for various sailing speeds and hull shapes$^*$. Our work has the potential to inform ship design, the detection of irregular vessels, and how coastal damage is attributed to specific vessels in shipping channels. $^*$R Pethiyagoda, TJ Moroney, GJ MacFarlane, JR Binns & SW McCue (2017) Time-frequency analysis of ship wave patterns in shallow water: modelling and experiments, arXiv:1702.06275
机译：我们涉及船舶唤醒的特性如何从在单点收集的表面高度数据中提取，因为船舶传播过去。我们使用的工具是一种频谱图，其是可视化表面高度信号的时间相关频谱的热图。在这次谈判中，焦点将呈现涉及具有施加到表面的压力分布的理想数学模型的理论框架。基于线性水波理论的几何论证为亚临界和超临界流动制度提供了令人鼓舞的结果。然后，我们通过将我们的分析与各种帆船速度和船体塑造的实验数据进行比较来总结一些最近的发现，以获得各种帆船速度和船体形状$ ^ * $。我们的工作有可能通知船舶设计，检测不规则船舶，以及沿海损害如何归因于航运渠道中的特定船只。 $ ^ * $ r Pethiyagoda，TJ Moroney，GJ Macfarlane，JR Binns＆SW MCCUE（2017年浅水中船波图案的时频分析：建模与实验，ARXIV：1702.06275

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