标题： 挪威海岸的海洋水动力分析降尺度——NORA-SARAH开放框架 显示英文标题

标题： Down-scale marine hydrodynamic analysis at the Norwegian coast -- the NORA-SARAH open framework

摘要： 在近海波浪研究中，通常假设高斯过程和均匀的波浪场。 然而，当波浪接近海岸线时，复杂的海岸地形和水深变化会引起折射、绕射、反射和破碎等变化，导致非线性增强和特定地点的波浪特征。 这种复杂性需要详细的特定地点研究，以用于海岸基础设施设计和蓝色经济规划。 本研究提出了一种降尺度程序，用于分析从远海气象海洋条件到结构物的波浪-结构相互作用。 开源的NORA3和NORA10EI历史数据库定义了远海海况，这些数据通过相位平均波浪模型SWAN传播到近岸区域。 输出结果用于相位解析模拟，使用完全非线性势流求解器REEF3D::FNPF，结合任意欧拉-拉格朗日（ALE）方法，通过莫里森公式计算波浪力并筛选极端事件。 进一步使用完全粘性纳维-斯托克斯求解器REEF3D::CFD来研究极端波浪荷载。 势流求解器和粘性求解器之间的一向水动力耦合（HDC）确保了信息的准确传递。 所提出的NORA-SARAH框架将NORA数据库与SWAN、REEF3D、ALE和HDC相结合，为复杂的海岸环境提供了一种稳健的方法。 一项在挪威南部的案例研究表明，该方法优于传统的显著波高（Hs）为基础或相位平均建模方法，突显了这种降尺度方法的必要性。 显示英文摘要

摘要： Offshore wave studies often assume Gaussian processes and homogeneous wave fields. However, as waves approach the shoreline, complex coastal topo-bathymetry induces transformations such as shoaling, refraction, diffraction, reflection, and breaking, leading to increased nonlinearity and site-specific wave characteristics. This complexity necessitates detailed site-specific studies for coastal infrastructure design and blue economy planning. This work presents a downscaling procedure for analyzing wave-structure interactions from offshore metocean conditions. The open-access NORA3 and NORA10EI hindcast databases define offshore sea states, which are propagated to nearshore regions using the phase-averaged wave model SWAN. The outputs inform phase-resolving simulations with the fully nonlinear potential flow solver REEF3D::FNPF, incorporating an Arbitrary Eulerian-Lagrangian (ALE) method to compute wave forces via Morisons formulation and to screen for extreme events. Extreme wave loads are further examined using the fully viscous Navier-Stokes solver REEF3D::CFD. A one-way hydrodynamic coupling (HDC) between the potential flow and viscous solvers ensures accurate information transfer. The proposed NORA-SARAH framework, integrating NORA databases with SWAN, REEF3D, ALE, and HDC, offers a robust approach for complex coastal environments. A case study in Southern Norway demonstrates its advantages over traditional significant wave height (Hs)-based or phase-averaged modeling practices, highlighting the necessity of this downscaling method.