Abstract In the present study, regular water wave interaction with rubble mound offshore breakwaters (RMOB) is investigated. The porosity of the RMOB is uniform, and the breakwaters are placed on the uniform seabed. Three different types of breakwaters such as (i) RMOB with still water level at the crest, (ii) emerged RMOB, and (iii) submerged RMOB are considered for the present analysis. The associated boundary value problem is handled for the solution using the boundary element method. Further, model tests are conducted, and the experimental results are compared with the numerical solutions. Quantitative analysis is carried out to show the effect of wave height and the height of RMOB’s on the wave reflection, wave transmission, and wave energy dissipation. An emerged RMOB can effectively reduce the wave transmission compared to the submerged RMOB and RMOB with crest level at SWL (still water level). The results indicate that the minimum transmission coefficient ( 0 . 2 ) can be achieved in the short wave regime. This study also suggests that 90% incident wave energy can be dissipated by emerged RMOB with 46% porosity.

中文翻译：

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水波与碎石堆海上多孔防波堤相互作用的数值模拟与实验模拟

摘要 在本研究中，研究了常规水波与碎石堆海上防波堤 (RMOB) 的相互作用。RMOB孔隙度均匀，防波堤置于均匀海床上。本分析考虑了三种不同类型的防波堤，例如 (i) 波峰静止水位的 RMOB，(ii) 浮出的 RMOB，和 (iii) 淹没的 RMOB。使用边界元方法为解决方案处理相关的边界值问题。进一步进行了模型试验，并将试验结果与数值解进行了比较。进行了定量分析以显示波高和RMOB的高度对波反射、波传输和波能量耗散的影响。与水下 RMOB 和波峰在 SWL（静水位）的 RMOB 相比，浮出水面的 RMOB 可以有效地降低波传输。结果表明，在短波范围内可以达到最小透射系数 (0 . 2)。这项研究还表明，90% 的入射波能量可以被具有 46% 孔隙率的 RMOB 消散。