Performance of multilayered porous breakwater under irregular waves having different wave spectrum

Santanu Kumar Dash, S. Koley, Subhendu Paul, Rajdip Dey, Maheswaran S
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Abstract

In this present work, the performance of a two‐layered thick porous breakwater of trapezoidal structure is investigated under the action of irregular waves. To investigate the physical problem, the classical linear water wave theory has been taken into consideration. To analyze the effect of irregular waves on the multilayered structure, two unidirectional wave spectra, namely the Pierson–Moskowitz and JONSWAP spectra based on the frequency domains are considered. Three different sea states are taken to analyze the impact of irregular waves on the multilayered porous breakwater. The constant boundary element method is used to handle the aforementioned boundary value problem, which is considered one of the most efficient numerical tools for handling complex structured open sea problems. Several wave characteristics associated with the spectral density functions are demonstrated and analyzed for a variety of structural and spectral parameters. The findings suggest that the adoption of suitable porous material for the construction of these breakwaters can significantly enhance the energy dissipation and thereby minimize the wave force on the structure.
多层多孔防波堤在不同波谱的不规则波下的性能
本研究探讨了梯形结构的双层厚多孔防波堤在不规则波作用下的性能。在研究物理问题时,考虑了经典的线性水波理论。为了分析不规则波对多层结构的影响,考虑了两种单向波谱,即基于频域的 Pierson-Moskowitz 和 JONSWAP 波谱。采用三种不同的海况来分析不规则波对多层多孔防波堤的影响。采用恒定边界元法处理上述边界值问题,该方法被认为是处理复杂结构公海问题最有效的数值工具之一。针对各种结构和频谱参数,演示和分析了与频谱密度函数相关的若干波浪特征。研究结果表明,采用合适的多孔材料建造防波堤可以显著提高消能效果,从而最大限度地降低波浪对结构的作用力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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