Fluid–structure interactions (FSI) are very common in many natural processes and engineering applications. However, modeling FSI with large structural deformations and turbulence flows under high Reynolds number ($Re$) is still a challenging task. Here, we present a hybrid 3D model that combines the advantages of Lattice Boltzmann Method (LBM) in solving complex flow problems and the capability of Material Point Method (MPM) in handling large structural deformations. A sharp interface coupling scheme is presented in detail and a LES sub-grid model is adapted for turbulent flows. The structure solver is validated by comparing with Euler beam theory and the fluid solver is tested for fluid round circle and cube obstacles under a large range of $Re$. The coupled model is validated by simulations of a flexible plate deformation in shear flows. Good agreements are found comparing with experimental results. Finally some applications of importing realistic geometries from Computer Assisted Design (CAD) software, are shown to demonstrate the future applications of the method.

流固耦合 (FSI) 在许多自然过程和工程应用中非常普遍。然而，在高雷诺数下模拟具有大结构变形和湍流的 FSI（$\mathrm{电阻}\mathrm{电子}$) 仍然是一项具有挑战性的任务。在这里，我们提出了一种混合 3D 模型，该模型结合了格子玻尔兹曼方法(LBM) 在解决复杂流动问题方面的优势以及材料点方法 (MPM) 在处理大型结构变形方面的能力。详细介绍了一个清晰的界面耦合方案，并且 LES 子网格模型适用于湍流。通过与欧拉梁理论对比验证了结构求解器，并在大范围内对流体圆形和立方体障碍物进行了流体求解器测试。$\mathrm{电阻}\mathrm{电子}$. 通过模拟剪切流中的柔性板变形来验证耦合模型。与实验结果相比，发现了良好的一致性。最后，展示了从计算机辅助设计 (CAD) 软件导入真实几何图形的一些应用，以展示该方法的未来应用。