潜堤对波浪传播变形的物理模型试验研究

Experimental Study of Wave Transmission Over A Submerged Breakwater

以不可渗透光滑潜堤为研究对象,基于波浪水槽试验,分析了规则波和不规则波通过淹没梯形潜堤时的波浪外部形态变化以及内部能量变化规律。探讨了不同波浪要素（周期、波高、淹没水深）对潜堤附近波高影响的变化规律。同时,探究了潜堤斜坡坡度、堤顶淹没水深对波浪频谱在频域分布的影响。研究结果表明：当波浪通过潜堤时,波浪主频能量衰减,波浪能量由低频向高频移动;潜堤斜坡坡度越大、堤顶水深越小,波浪主频能量衰减越剧烈;波浪通过潜堤后高频波能量占潜堤次生波能量的1%~30%。

Based on the experimental studies of impermeable smooth submerged breakwater in the wave tank,it has been studied how the submerged breakwater impact on the characteristics of the wave profile and the energy when regular wave and random wave pass over a submerged breakwater.It discussed the influence of different wave parameter（period,wave height,submerged depth）on the wave height near the submerged breakwater.The impact of breakwater slope and the submerged depth on wave spectrum change were analyzed.The results showed that when wave passed over the submerged breakwater,the energy decreased,wave energy transmitted from low frequency domain to high frequency domain.The steeper submerged breakwater slope was,and smaller submerged depth was,the more violent wave energy attenuation occur;the super harmonics wave energy occupied 1%~30% of the total transmitted wave energy.