CFD-Based Coupled Dynamic Response Analysis of Shared-Mooring Floating Systems

Paper in proceeding, 2026

The shared-mooring concept offers a cost-effective approach for floating offshore wind farms by enabling multiple platforms to share anchors and mooring lines. However, the coupled dynamic interactions among platforms, mooring lines, and turbine-induced loads, including wake effects, remain insufficiently understood. This study develops a fully coupled numerical model by integrating STAR-CCM+ with the open-source mooring code MoorDyn V2 via a dynamic link library, with turbine wakes represented using the virtual disk method. The model is validated against experimental measurements, demonstrating its capability to accurately capture platform motions under regular wave conditions. Using this framework, the influence of shared-mooring configurations on dynamic responses is investigated. Results indicate that shared mooring can significantly alter platform motions and line tensions, with certain wave periods amplifying pitch motions and increasing mooring loads, which may affect system reliability.