First- and Second-order Hydrodynamic Forces and Momentson Two Offshore Floating Structures in Waves

摘要

As oil or gas field moves deeper offshore area, offshore offloadingoperations such as Tandem or Side-by-Side arrangement between twofloating structures take place in many locations throughout the worldand also have many hydrodynamic problems. Therefore, the researcheson the motion response and hydrodynamic force including first andsecond order between two floating structures are needed to have themore safe offloading operability in waves.In this paper, the hydrodynamic aspects including hydrodynamicinteraction effect between two floating structures in waves are studiedby using a linearized three-dimensional potential theory together withsimplified boundary conditions. Numerical calculations have beencarried out for hydrodynamic pressure, coupled motion responses, firstand second order wave force between two floating structures in wavesusing three-dimensional pulsating source distribution techniques. Thenumerical results give a good correlation with the well-knownexperimental and theoretical results. The numerical results show thepresent tool can be used effectively to predict the hydrodynamic forceof multiple offshore floating structures in waves.