Performance of an F-type floating breakwater: A numerical and experimental study
Performance of an F-type floating breakwater: A numerical and experimental study
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F 型浮动防波堤的性能：数值和实验研究
DOI：
10.1177/1475090216673461
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发表时间：
2017-05
期刊：
影响因子：
--
通讯作者：
Ma Shan
中科院分区：
文献类型：
--
作者：
Duan Wenyang;Xu Shupeng;Xu Qianlong;Ertekin R. Cengiz;Ma Shan
浮式防波堤是一种长宽比大的结构物。浮式防波堤的纵断面是决定其水动力性能的关键。本文介绍了一种新型的F型浮式防波堤。它的轮廓是不对称的，看起来像英文字母“F”。给出了该F型浮式防波堤的数值计算结果和试验结果。基于线性势流理论，首先提出了研究二维浮体与波浪相互作用问题的边界元方法。然后，在波浪水槽中进行了二维试验，测量了F型浮式防波堤的绕射波和辐射波、透射系数和反射系数以及运动响应。结果表明，实验数据与数值计算结果基本吻合。当F型浮式防波堤固定时，当B/λ(模型宽度与波长之比)大于0.18时，测得和计算的透射率均小于0.5.当F型浮堤只允许垂直滑动时，B/λ比大于0.2时，允许F型浮堤旋转滑动时，B/λ比大于0.22.为了了解剖面几何形状对F型浮式防波堤性能的影响，对F型浮式防波堤的主要尺寸，包括剖面宽度、吃水和倾角进行了参数研究。结果表明，在某些海况下，传输系数对吃水变化特别敏感。这些结果是重要的，因为寻求最优的主尺寸可以确保最小的位移体积，从而使用更少的材料，大大降低建设成本。
Floating breakwaters are structures with large ratio of length to breadth. The profile of an floating breakwater is the key to the hydrodynamic properties of it. In this work, a new kind of an F-type floating breakwater is presented. Its profile is asymmetric and looks like the English letter “F.” We present both numerical and experimental findings on this F-type floating breakwater. Based on linear potential-flow theory, first, the boundary-element method is presented to study the interaction problem of a two-dimensional floating body with waves. Following that, the two-dimensional experiments are conducted in a wave flume to measure the diffracted and radiated waves, the resulting transmission and reflection coefficients, and the motion responses of the F-type floating breakwater. It is shown that the experimental data are, in general, in good agreement with the numerical predictions. The transmission coefficients that are measured and calculated are under 0.5 when the ratio of B/λ (the ratio of model breadth to wavelength), when the F-type floating breakwater is fixed, is larger than 0.18. The ratio of B/λ, when the F-type floating breakwater is allowed to slide vertically only, is larger than 0.2 and the ratio of B/λ, when the F-type floating breakwater is allowed to rotate and slide, is larger than 0.22. To understand how the profile geometry can affect the performance of the F-type floating breakwater, a parametric study of the F-type floating breakwater’s main dimensions, including its profile breadth, draft, and angle, is conducted on the wave transmission coefficient. It is found that the transmission coefficients are particularly sensitive to the change in draft for certain sea conditions. These results are important since seeking the optimal principal dimensions can ensure minimum volume of displacement, thereby using less material and reducing the cost of construction sharply.
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影响因子：
5
作者：
G. Dong;Y. N. Zheng;Yu-cheng Li;B. Teng;Chang-tao Guan;D. Lin
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DOI：
10.1016/b978-0-08-097150-6.10007-7
发表时间：
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期刊：
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