Resonant Oscillation of a Moored Floating Body due to Ship-Generated Waves

Two kinds of resonant oscillation due to transient ship-generated waves are studied from the viewpoint of dynamic response of the mooring system, where ship-generated waves are idealized as a wave packet. Short periodic resonance with the same period as ship-generated waves is discussed compared with steady-state response due to monochromatic waves. Long periodic resonance due to slowly-varying wave drift force associated with grouped waves is also investigated including transient free oscillation of the system.