新型透空组合板式防波堤结构型式及消浪特性分析

为提高透空式防波堤的消浪性能并减小结构受力，在前人研究基础上提出了一种新型透空组合板式防波堤，比较分析了该型式的防波堤(模型c)与另外两种型式的防波堤(模型a和模型b)的结构特点。通过物理模型试验，探讨了模型c在不同影响因素下的消浪特性，并对比分析了模型a与模型c的透射系数、反射系数和能量耗散系数在不同相对堤宽下的变化关系，比较了两种模型的消浪效果。分析得出，由于模型c兼具开孔水平板式防波堤和开孔挡板式防波堤的作用，模型c的波浪反射小于模型a，消浪效果优于模型a，且模型c这种结构能有效减小防波堤结构受力；当模型宽度和相对间隙比同时较大时消浪效果更好，防波堤出水后的消浪性能要优于淹没状态下的防波堤。

Analysis of structure and wave dissipation characteristics of a new type of perforated composite plate breakwater

In order to improve the wave dissipation performance of perforated breakwater and to reduce the stress of the structure, a new type of perforated composite plate type breakwater (Model c) is proposed. The structural features of the breakwater (Model c) are analyzed by comparison with the other two types of breakwaters (Models a and b) . The physical model test is carried out to study the wave dissipation characteristics under different influence factors. The comparative analysis of transmission coefficients, reflection coefficients and energy dissipation coefficients of Model a and Model c is made, under different relative structure widths. And the wave absorbing effects of Models a and c are compared. The results indicate that Model c has the function of both the opening horizontal plate type breakwater and the perforated baffle type breakwater; the wave reflection of Model c, with a better wave dissipation effect, is smaller than that of Model a, and the structure of Model c can effectively reduce the force acting on the breakwater structure. When the width and the relative clearance ratio of the model are both large, the wave dissipation effect is better, and the wave dissipation performance of the breakwater in the unsubmerged state is better than that in the submerged state.