Estimating ocean wave directional spreading using wave following buoys: a comparison of experimental buoy and gauge data
Estimating ocean wave directional spreading using wave following buoys: a comparison of experimental buoy and gauge data
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DOI：
10.1007/s40722-021-00218-7
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发表时间：
2021-11
影响因子：
1.9
通讯作者：
Zhaoxian Lin;T. Adcock;M. L. McAllister
中科院分区：
文献类型：
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作者：
Zhaoxian Lin;T. Adcock;M. L. McAllister
波浪定向传播在波浪荷载、波浪非线性演化、波浪破碎等海洋工程中起着重要的作用。波浪跟踪浮标广泛部署在海洋中，提供了测量方向性波浪特性的潜力。为了评估使用浮标测量进行的定向传播估计的准确性，我们比较了基于实验获得的浮标和波浪测量的估计值，这些测量值首先在麦卡利斯特和货车den Bremer（J Phys Oceanogr 50：399-414，2020）中提出。我们研究实验以下（单峰方向）和交叉（双峰方向）海状态。除此之外，我们还使用合成波数据来研究波生成和非线性对扩展估计的影响。我们的研究结果表明，虽然使用浮标测量产生的方向估计是相当准确的以下海况，他们很难确定不同的方向峰在穿越海况。我们发现，使用浮标测量的传播估计往往低估了方向性传播的程度，大约在以下的海况，这是最明显的狭窄的传播条件。
Directional spreading of ocean waves plays an important role in various aspects of ocean engineering, such as wave-induced loads, nonlinear wave evolution, and wave breaking. Wave following buoys, which are widely deployed across the oceans, offer the potential to measure directional wave properties. To assess the accuracy of directional spreading estimates made using buoy measurements, we compared estimates based on experimentally obtained buoy and wave gauge measurements, first presented in McAllister and van den Bremer (J Phys Oceanogr 50:399–414, 2020) Buoy and gauge measurements were recorded at the same locations and in identical sea states, allowing for a like-for-like comparison. We examine experiments with both following (unimodal in direction) and crossing (bimodal in direction) sea states. In addition to this, we use synthetic wave data to investigate the effects of wave generation and nonlinearity on spreading estimates. Our results show that while directional estimates produced using buoy measurements are reasonably accurate in following sea states, they struggle to identify distinct directional peaks in crossing sea states. We find that spreading estimates made using buoy measurements tend to underestimate the degree of directional spreading by approximatelyin following sea states, which is most apparent in narrowly spread conditions.