42 / 2025-04-16 14:42:27

HOS-SPH-FEM Coupling for Predicting Hydroelastic Responses of Ship Structures Under Extreme Wave Loading

HOS-SPH-FEM Coupling; Ship Structures; Hydroelastic Responses; Extreme Wave Loading

Predicting the hydroelastic responses of ship structures under extreme wave loading is essential in ocean engineering field. To overcome the computational inefficiency of traditional SPH approaches in handling multi-scale fluid-structure interactions, a coupled HOS-SPH-FEM framework is established: (1) The High-Order Spectral (HOS) method efficiently simulates large-scale nonlinear wave fields; (2) The Smoothed-Particle Hydrodynamics (SPH) method is strategically applied to critical zones to capture localized strong nonlinear phenomena such as green water effects and slamming impacts, with an enhanced Lagrangian particle injection technique [1] facilitating flow information transfer from the HOS domain to SPH regions; (3) The Finite Element Method (FEM) is employed for structural response simulation, utilizing a single-layer particle boundary methodology integrated with Particle Anti-Penetration Technology to effectively couple surface meshes with SPH particles.

The model's validity and robustness are demonstrated through benchmark case studies , including the structural response of flexible float under dam breaking wave (as shown in Figure 1). The presented coupling scheme achieves far-field extreme wave generation/evolution simulation and meanwhile near-field fluid-structure interaction dynamics with structural deformation analysis, offering an advanced approach for high-precision multi-physical coupling analysis in marine engineering applications.