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

P. X. Zou*, Jeremy D. Bricker, L. Z. Chen, Wim S.J. Uijttewaal, Carlos Simao Ferreira

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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

Original languageEnglish
Article number113809
Number of pages15
JournalEngineering Structures
Publication statusPublished - 2022


  • CFD
  • Flow-induced vibration
  • Fluid structure interaction
  • Submerged floating tunnel
  • Vortex-induced vibration

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