Boundary element modeling of multidirectional random waves in a harbor with a rectangular navigation channel
Boundary element modeling of multidirectional random waves in a harbor with a rectangular navigation channel
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DOI：
10.1016/j.oceaneng.2009.09.009
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发表时间：
2009-12
影响因子：
5
通讯作者：
H. Lee;Sung Duk Kim;Keh-Han Wang;Si-Yul Eom
中科院分区：
文献类型：
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作者：
H. Lee;Sung Duk Kim;Keh-Han Wang;Si-Yul Eom
提出了在港口入口外疏浚长航道的港口内，预测定向随机波绕射波场的数值模型。本研究在港区考虑部分反射边界，在研究区域的航道、港口和外部区域设置不同的恒定水深。模拟定向随机波的方法是基于二维边界积分法得到的单色波分量的衍射解的叠加。入射波的条件是用离散形式的Mitsuyasu的频谱和方向函数指定。通过与已发表的实验数据的比较，验证了本文的数值模型，得到了较好的吻合结果。本文还提出了其他计算实例，以检验长矩形沟道（或坑）对港口波场的影响。通过对计算结果的比较，认为本文所建立的数值模型对于预测港口内和坑状航道周围的波场是一种有效的工具，具有广泛的应用价值。
A numerical model is presented for the prediction of the wave field due to the diffraction of directional random waves in a harbor with a long navigation channel dredged in the exterior region of the harbor entrance. In this study, partially reflected boundaries are considered in the harbor region and different constant water depths are set at the channel, the harbor and the exterior region of the study domain. The method for simulating the directional random waves is based on the superposition of diffraction solutions for the monochromatic wave components obtained by a two-dimensional boundary integral approach. The incident wave conditions are specified using discretized forms of the Mitsuyasu's frequency spectrum and directional function. The present numerical model is validated through comparisons with published experimental data, where good agreement between the simulated results and experimental data are obtained. Other example calculations to examine the effect of long rectangular channels (or pits) on the wave field in the harbors are also presented. Based on the comparisons in results, it is concluded that the present numerical model is an adequate and efficient tool to predict the wave field inside a harbor and around a pit like navigation channel for many practical applications.