防波堤堤后次生波的试验研究

在小比尺的大范围整体物理模型试验及数值模拟中,由于模型本身存在底摩阻、比尺效应及计算软件等影响因素,测量所得堤后次生波波高精度较低。因此通过采用大比尺波浪断面物理模型试验,选取不同入射波要素和堤顶淹没水深,研究次生波的基本特性,得到入射波高与次生波的关系;同时利用局部整体模型,分析得出波浪对防波堤不同角度入射时,角度与堤后次生波的关系。试验结果可为大范围整体物理模型试验提供校验依据,也可为数值模拟防波堤堤顶越浪,进行参数调整提供必要的依据。

Experimental research on secondary wave height over breakwater

Measurement accuracy of secondary wave was usually not satisfactory in large scope and small scale physical model and numerical model because of the influence of bottom friction, scale effect and calculation software. Basic characteristic of secondary wave was studied in this paper based on cross-sectional physical model with large scale. The relationship between incident wave and secondary wave was obtained from combinations with different incident wave parameters and submerged water depth over the top of breakwater.Then the relationship between incident wave direction and secondary wave was experimented by a local physical model. The results of the experiment could provide validation for large scope and small scale physical model, as well as necessary reference for parameter adjustment of numerical model.