A numerical model is established to investigate the run-up of a solitary wave after propagating over a triangular saw-tooth-shaped submerged breakwater. A rectangular-shaped submerged breakwater is simulated for comparison. Several factors, including the submerged depth, the lagoon length and the beach slope, are selected as independent variables. The free surface motions and velocity fields of the solitary wave interacting with the submerged breakwater are discussed. The results show that the submerged depth and lagoon length play significant roles in reducing the run-up. The influence of the beach slope is not significant. At the same submerged depth, the triangular saw-tooth-shaped submerged breakwater has only a slightly better effect than the rectangular-shaped submerged breakwater on the run-up reduction. However, a calmer reflected wave profile could be obtained with the rougher surface of the saw-tooth-shaped submerged breakwater. The study conclusions are expected to be useful for the conceptual design of saw-tooth-shaped submerged breakwaters.

建立了一个数值模型来研究在三角锯齿形淹没式防波堤上传播后孤波的传播。为了比较，模拟了矩形的水下防波堤。选择包括淹没深度，泻湖长度和海滩坡度在内的几个因素作为自变量。讨论了孤波与水下防波堤相互作用的自由表面运动和速度场。结果表明，淹没深度和泻湖长度在减少上升过程中起着重要作用。海滩坡度的影响不大。在相同的浸没深度下，三角形锯齿形浸没式防波堤在减径方面的效果仅比矩形浸没式防波堤略好。然而，锯齿形淹没式防波堤的表面较粗糙，可以获得较平静的反射波轮廓。研究结论有望对锯齿形淹没防波堤的概念设计有用。