Response of a submerged floating tunnel subject to flow-induced vibration

In order to assess the dynamic performance of a submerged floating tunnel (SFT) subject flow-induced vibration (FIV) conditions in practical engineering application, one-way fluid–structure interaction (FSI) model consisting multi-scale hydrodynamic solvers combined with finite element method (FEM) is established. A typical long, large aspect ratio SFT modeled by coupling tube, joint, and mooring components. The simulated time domain under currents, waves, extreme events. FIV SFTs different cross-section shapes investigated analyzing each structure’s natural frequencies, hydraulic loading frequency, dominant modes. results show that tube dominated wave conditions. excitation SFT’s first mode height period should be avoided. Standing traveling patterns multi-mode response are observed during forcing structural can effectively reduced adopting parametric cross-section.