Floating breakwaters with a mooring system have been widely applied to protect marine infrastructures (e.g., artificial beach or island, aquaculture farm or marine vessels in harbors) from being destroyed by severe waves. In this paper, an innovative cylindrical dual pontoon-net floating breakwater was developed to enhance the wave attenuation capacity. This dual-module floating breakwater system was constructed as the prototype for on-site testing. A fully nonlinear time-domain model based on the coupled iterative solutions of the fluid integral equation and the pontoon-net dynamic equations was proposed to simulate the interactions between waves and the floating breakwater system. The flow field around the nets was simulated by introducing a porous-media model with Darcy’s law, while the deformation of the flexible nets was solved by using the lumped mass model. The instantaneous free surface was captured using the mixed Eulerian-Lagrangian (MEL) approach which employs an improved moving-grid technique based on the spring analysis to re-mesh the instantaneous water surface and the body wetted surface. On-site tests were also conducted to evaluate wave transmission performance of the floating breakwater system and to validate the numerical model. The comparisons show that the numerical solutions are in good agreement with the measured data. The effects of incident wave direction, wave period, wave height, net height, net number and net porosity on the hydrodynamic performance of the floating breakwater system were emphatically examined.

带系泊系统的浮动防波堤已被广泛应用于保护海洋基础设施（例如，人工海滩或人工岛、水产养殖场或港口的海船）免受强浪的破坏。在本文中，开发了一种创新的圆柱形双浮筒网浮动防波堤，以增强波浪衰减能力。这种双模块浮动防波堤系统被构建为现场测试的原型。提出了一种基于流体积分方程和浮筒-网动力方程耦合迭代解的全非线性时域模型来模拟波浪与浮动防波堤系统之间的相互作用。通过引入具有达西定律的多孔介质模型来模拟网周围的流场，而柔性网的变形是通过使用集中质量模型来解决的。瞬时自由表面是使用混合欧拉-拉格朗日 (MEL) 方法捕获的，该方法采用基于弹簧分析的改进移动网格技术来重新划分瞬时水面和身体润湿面。还进行了现场测试以评估浮动防波堤系统的波浪传输性能并验证数值模型。比较表明数值解与实测数据吻合良好。重点研究了入射波向、波浪周期、波高、净高、净数和净孔隙度对浮动式防波堤系统水动力性能的影响。瞬时自由表面是使用混合欧拉-拉格朗日 (MEL) 方法捕获的，该方法采用基于弹簧分析的改进移动网格技术来重新划分瞬时水面和身体润湿面。还进行了现场测试以评估浮动防波堤系统的波浪传输性能并验证数值模型。比较表明数值解与实测数据吻合良好。重点研究了入射波向、波浪周期、波高、净高、净数和净孔隙度对浮动式防波堤系统水动力性能的影响。瞬时自由表面是使用混合欧拉-拉格朗日 (MEL) 方法捕获的，该方法采用基于弹簧分析的改进移动网格技术来重新划分瞬时水表面和身体润湿表面。还进行了现场测试，以评估浮动防波堤系统的波浪传输性能并验证数值模型。比较表明数值解与实测数据吻合良好。重点研究了入射波向、波浪周期、波高、净高、净数和净孔隙度对浮动式防波堤系统水动力性能的影响。还进行了现场测试，以评估浮动防波堤系统的波浪传输性能并验证数值模型。比较表明数值解与实测数据吻合良好。重点研究了入射波向、波浪周期、波高、净高、净数和净孔隙度对浮动式防波堤系统水动力性能的影响。还进行了现场测试以评估浮动防波堤系统的波浪传输性能并验证数值模型。比较表明数值解与实测数据吻合良好。重点研究了入射波向、波浪周期、波高、净高、净数和净孔隙度对浮动式防波堤系统水动力性能的影响。