长周期波浪对潜堤-弧板式防波堤作用的水动力特性研究

Hydrodynamic characteristics of submerged embankment arc plate composite structuresunder action of long-period waves

鉴于长周期波浪条件下海洋防护结构物的消浪效果不理想,本文提出一种潜堤—弧板式防波堤结构。基于开源流体力学平台OpenFOAM,采用连续方程和雷诺平均斯托克斯方程作为流体控制方程,建立波浪与潜堤-弧板式防波堤结构相互作用的数值模型。采用试验结果验证的数值模型,分析弧板宽度、潜深对潜堤-弧板式防波堤消浪性能的影响,并探讨潜堤-弧板式防波堤弧板上下表面所受波浪压力的分布特性。结果表明:在设定的波浪周期范围内,潜堤-弧板式防波堤的透射系数随潜深和弧板宽度的增大而减小;其反射系数随潜深和板宽的增大而增大。潜堤-弧板式防波堤弧板下表面的正负压力值关于横轴近似对称,上表面不同测点之间的正负压力值存在显著差异。研究结果可为工程应用提供一定的理论与技术指导。

Considering that the wave dissipation effect of marine protective structures under long-period wave conditions is not ideal,this paper proposes a breakwater structure of submerged embankments and arc plates.Based on the open-source fluid dynamics platform OpenFOAM,a numerical model of the interaction between waves and submerged breakwaters with curved plate breakwaters is established using the continuous equation and Reynolds averaged Stokes equation as the fluid control equations.Using a numerical model validated by experimental results,the influence of arc width and submergence depth on the wave dissipation performance of a submerged breakwater arc plate breakwater is analyzed,and the distribution characteristics of wave pressure on the upper and lower surfaces of the submerged breakwater arc plate breakwater arc plate are explored.The results show that within the wave period range set in this article,the transmission coefficient of the submerged breakwater and the arc plate breakwater decreases with the increase of submerged depth and arc plate width.Its reflection coefficient increases with increasing depth and plate width.The positive and negative wave pressures on the lower surfaces of the submerged breakwater and arc plate breakwater are approximately symmetrical about the horizontal axis,while there are significant differences in the positive and negative pressure values between different measurement points on the upper surface.The research results can provide certain theoretical and technical guidance for engineering applications.