Interaction of non-breaking regular waves with a periodic array of artificial porous bars
Interaction of non-breaking regular waves with a periodic array of artificial porous bars
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DOI：
10.1016/j.coastaleng.2004.01.002
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发表时间：
2004-05
影响因子：
4.4
通讯作者：
S. Twu;Cheng-Chi Liu
中科院分区：
文献类型：
--
作者：
S. Twu;Cheng-Chi Liu
建立了一个计算模型，研究了周期性排列多孔杆的波浪阻尼特性。计算了杆件的透射系数、反射系数和波能耗散与杆件的物理性质和几何因素的关系。结果表明，孔隙率，数量，宽度和高度的酒吧波阻尼特性都发挥重要作用，相比其他因素，如固有渗透率。据观察，像不透水杆，渗透性酒吧显示布拉格现象。然而，布拉格反射产生的渗透性酒吧小于不渗透性酒吧。透水杆反射较小的波，透射较小的波，耗散更多的波能。结果表明，孔隙率越大，反射系数和透射系数越小，耗散的波能越多。此外，它被发现，孔隙率控制的幅度，但不是振荡频率的反射系数，这只取决于数量的酒吧。
A computational model is developed to investigate the wave damping characteristics of a periodic array of porous bars. The transmission and reflection coefficients as well as the wave energy dissipation are evaluated relating to the physical properties and geometric factors of bars. It is shown that the porosity, number, width and height of bars all play important roles in the wave damping characteristics, compared to other factors such as the intrinsic permeability. It is observed that like impermeable bars, permeable bars display Bragg phenomenon. However, Bragg reflection produced by permeable bars is smaller than that by impermeable bars. Permeable bars reflect smaller waves, transmit smaller waves and dissipate more wave energy. It is indicated that if the porosity increases, both the reflection and transmission coefficients decrease and more wave energy is dissipated. Further, it is found that the porosity controls the magnitude, but not the oscillation frequency of the reflection coefficient, which depends only on the number of bars.