T型透空式防波堤消波性能的理论分析

摘要

We perform a theoretical analysis of the performance of wave dissipation of T-type open breakwater based on the linear wave theory. We use the method of eigenfunction expansions to obtain a general expression of the basin velocity potential by considering the thickness of horizontal and vertical plates. The undetermined coefficient is determined from the velocity potential and the continuous conditions of velocity considering the changing relationship between reflection coefficient and transmission coefficient of T-type open breakwater on wave. We calculate and analyze the factors that influence the performance of wave dissipation of T-type open breakwater such as the depth of horizontal plate and the height of vertical plate. Overall, our findings are in well agreement with those of existing theory. The depth of horizontal plate and the height of vertical plate have great influence on the performance of wave dissipation of submerged and emerged T-type open breakwater.%基于线性波浪理论，对T型透空式防波堤的消波性能进行了理论分析。在考虑水平板和竖直板厚度的条件下，通过特征函数展开法，给出流域内速度势的一般表达式，由速度势和速度的连续条件确定表达式中的待定系数，从而得到T型透空式防波堤对波浪的反射系数和透射系数随波数的变化关系，并对影响T型透空式防波堤消波性能的因素如水平板的潜深和竖直板高度等进行了计算和分析。计算结果与现有相关理论结果吻合良好；水平板的潜深和竖直板的高度对淹没和出水T型透空式防波堤的消波性能有较大影响。