Abstract: Submerged floating tunnels(SFTs) are a new type of transportation structure used to cross deep water. To ensure the dynamic stability of SFTs under wave and current loading, an appropriate mooring system is required. This research focuses on submerged floating tunnels with anchor cables and investigates the impact of different anchor cable layouts on the dynamic response of SFTs. Utilizing OrcaFlex software, finite element models are established to analyze the stiffness of mooring systems under both vertical and inclined layouts. The variations in tunnel displacement, acceleration, and anchor cable tension under regular waves and uniform currents are examined. The results show that the inclined anchor cable layout with an inclination angle of 45° and an installation angle of 45° can effectively suppress the vertical and lateral motion response of the tunnel, ensuring structural stability and preventing anchor cable fatigue damage. Furthermore, this layout is applicable to SFTs of different lengths.

Key words: submerged floating tunnel, anchor cable layout, wave and current loads, OrcaFlex