潜堤传递波高系数研究

Study on wave transmission coefficient over submerged breakwater

《防波堤与护岸设计规范》推荐的浅堤传递波高系数计算公式仅考虑了堤顶相对水深这一主要影响因素。本文基于MIKE21 SW建立波浪数值计算模型,针对浅堤传递波高系数的各影响因素展开研究,并对推荐公式在不同工况下的适用性进行分析。研究结果表明:堤顶相对水深和堤顶相对宽度是潜堤传递波高系数的主要影响因素;2≤B H≤3且h c H≤1.25时,推荐公式的适用性良好;B H≤1、B H≥4、2.0>h c H≥1.5时,须结合相关试验研究确定潜堤传递波高系数。

Wave transmission coefficient formula in Code of Design for Breakwater and Revetment only takes relative depth above the submerged breakwater crown into consideration.Based on numerical simulation using MIKE21 SW model,we carry out a study on the factors of wave transmission coefficient and analyze the suitability of the formula under different conditions.Results show that relative depth and relative width of the submerged breakwater crown are major factors.When 2≤B H≤3 and h c H≤1.25,the formula works well;When B H≤1 or B H≥4 or 2.0>h c H≥1.5,it is suggested to carry out experimentation to estimate the wave transmission coefficient.