Hydrodynamic and power performance of a V-shaped floating wind-wave integrated system based on multi-field coupling

With the continuous growth of the global economy, energy security and climate change issues are increasingly receiving widespread attention from the international community, further highlighting the importance of renewable energy. Currently, various marine renewable energy systems, represented by Floating Offshore Wind Turbines (FOWTs) and Wave Energy Converters (WECs), have progressed from concept validation and prototype sea trials to demonstration projects and pilot deployments. To further enhance the power generation, optimize the system's dynamic performance, and reduce the construction and operation costs of floating offshore wind turbine systems, this study proposes and analyzes a wind-wave integrated system. This system integrates a 5 MW V-shaped FOWT with an array of Salter's Duck Wave Energy Converters (SD WECs). The integrated system effectively captures wave energy generated by the relative motion between the wind turbine and wave energy devices through a Power Take-Off (PTO) system. Under various typical sea conditions, the study first established a numerical simulation model of this integrated system using ANSYS-AQWA software. Subsequently, a multi-field coupled dynamic analysis, encompassing aerodynamic, hydrodynamic, servo-control, and elastic structural aspects, was conducted based on the open-source code F2A, to deeply investigate the integrated system's dynamic characteristics and energy output performance. The research findings provide important theoretical basis and technical support for the efficient development and utilization of marine renewable energy.