Numerical Investigation of the Frequency-domain Coupled Hydrodynamics for Two Ships Advancing at Close Proximity in Waves

As the expanding family of replenishment ship all over the world, replenishment technology at sea is now concerned more and more in the both fields of naval and civilian ships. From the view of fluid hydrodynamics, the alongside replenishment problem of two ships advancing at sea can be summarized as the hydrodynamic interaction effect between two floating bodies. Present work focuses on the frequency-domain coupled hydrodynamic problem for two advancing ships in waves, in which the three-dimension translating-pulsating source Green function is adopted as the foundation of theoretical model. The three-dimension frequency-domain analysis method is constructed to solve the coupled wave forces and motion responses of two advancing ships in regular waves. Within the framework of potential flow theory, the perturbation potential of two-ship spatial field is decomposed into incident potential, radiation potential and diffraction potential. The numerical results of two-ship motion responses and wave forces are validated by towing tank test.