Freely floating body motion responses induced by wave and current in seabed conditions

摘要

Two dimensional freely floating body motion responses induced by wave and current are investigated in seabed conditions. This problem is solved by boundary integral method, which is formulated by a combination of steady, diffraction/radiation and reflection potential problems accounting for current, incoming wave and seabed effects respectively. All the three potential problems are solved using a boundary element model involving a continuous Rankine source method subject to appropriate boundary conditions. The presence of incoming wave, current and seabed causes an asymmetric fluid domain. Numerical simulations show that water depth, seabed slope angle, current speed, current direction and cross coupling effects are significantly important for surge, heave and roll motion responses.