The gravity wave interaction with submerged breakwater of different structural configurations are investigated based on the small-amplitude wave theory. The boundary value problem is analysed in two-dimension using the linearized wave theory in water of finite depth. The submerged breakwater structural configuration such as (i) thin-walled type (impermeable), (ii) rectangular type (impermeable and permeable), (iii) triangular type (impermeable, permeable, perforated), (iv) trapezoidal type (impermeable, permeable, perforated) and (v) Tandem type (impermeable, permeable, perforated) are considered to analyse and performance of the breakwater. The numerical model is developed using the Multi-Domain Boundary Element Method (MDBEM) to analyse the hydrodynamic scattering coefficient (such as reflection, transmission and dissipation coefficient) for the change of physical parameters such as relative spacing between the breakwaters, relative water depth and structural dimensions. The convergence of the present numerical model is performed for the specific case of tandem breakwater and numerical computation is validated with the results available in the literature. The wave reflection and transmission coefficient along with wave force on the structure is analysed for different shapes, structural parameters and geometrical parameters of the breakwater to maximize the efficiency of breakwater. In the case of permeable breakwater, the submerged tandem breakwater is found to be more efficient in wave transformation as compared to rectangular, triangular and trapezoidal permeable submerged breakwaters. The comparative analysis performed on different configurations of the breakwater in the present study will be helpful in the effective design of the breakwater near the harbour regions.

基于小振幅波理论研究了重力波与不同结构配置的淹没式防波堤的相互作用。在有限深度的水中，利用线性化波浪理论对边界值问题进行二维分析。淹没式防波堤结构配置如（i）薄壁型（不透水），（ii）矩形型（不透水和透水），（iii）三角形（不透水，透水，穿孔），（iv）梯形（不透水，可渗透的、穿孔的）和 (v) 串联型（不可渗透的、可渗透的、穿孔的）被认为是分析防波堤的性能。该数值模型是使用多域边界元方法 (MDBEM) 开发的，用于分析流体动力学散射系数（例如反射、传输和耗散系数）用于物理参数的变化，例如防波堤之间的相对间距、相对水深和结构尺寸。本数值模型的收敛是针对串联防波堤的具体情况进行的，数值计算通过文献中可用的结果进行了验证。针对不同形状、结构参数和几何参数的防波堤，分析波浪反射、透射系数以及结构上的波浪力，以最大限度地提高防波堤的效率。在渗透性防波堤的情况下，发现与矩形、三角形和梯形渗透性水下防波堤相比，水下串联防波堤在波浪变换方面更有效。