水下上弧形板结构的水动力特性研究

文章应用边界单元法，依据波浪绕射和辐射理论研究了一种新型的板式防波堤结构—上弧形板结构。研究中通过与另外三种板式防波堤结构(下弧形板结构，单板结构，双层板结构)的对比，验证了这一新型结构具有更好的消波效果。文中重点分析了这种新型结构的散射波浪力、透射系数和反射系数，并且为了进一步揭示这种结构的消波原理，对该结构周围的流场进了分析。研究发现：（1）上弧形板结构在横荡方向上所受波浪力最小。（2）当潜深波高比为0.05时，该结构的消波效果比其他三种结构增强约50%。（3）通过对上弧形板结构的速度流场分析，发现上弧形板结构上部有明显回流。

Study on hydrodynamic characteristics of submerged upper arc-shaped plate type breakwater

Based on wave radiation and diffraction theory, a new upper arc-shaped plate type breakwater is investigated by using boundary element method (BEM). By comparing with other three type breakwater (lower arc-shaped plate, single horizontal plate and double horizontal plates), this new type breakwater was proved more effective. The exiting force, transmission coefficient and reflection coefficient are analyzed. In order to reveal the wave elimination mechanism of this type breakwater, the velocity field around breakwater is obtained. The results show that: (1) The sway exiting force is minimal. (2) When ratio of submergence and wave amplitude is 0.05, the wave elimination effecting will increase 50%than the other three type break-water. (3) The obvious backflow is found above the plate in velocity field analysis.