Numerical simulation and analysis of UUV docking with a Seabed Moored Floating Dock

The docking station plays a crucial role in enhancing the endurance of Unmanned Underwater Vehicles (UUVs) through facilitating rapid recharging and data transfer. The interaction between the UUV and the station significantly influences the success rate, efficiency, and safety of the docking process. This research seeks to comprehend the contact process involved in UUV docking with both floating and fixed docks and to propose potential solutions. To achieve this, a model is developed to simulate the UUV docking process and motion response to a Seabed Moored Floating Dock (SMFD) utilizing the Dynamic Fluid Body Interaction (DFBI) method with contact coupling. Sea trial results are then compared with the simulation data to validate the model. Subsequently, an analysis of four key design parameters is conducted to guide the optimization of the SMFD based on the proposed model. Finally, the differences between floating and fixed docks in motion response, docking time, and accuracy are discussed based on the results of various operating conditions. The study's findings indicate that the flexibility of the floating dock offers enhanced docking efficiency, stability, safety, and docking space, albeit with a marginal reduction in accuracy. The study concludes by providing practical suggestions for the design of the floating dock and the execution of UUV docking maneuvers.