Abstract:Based on the three dimensional potential flow theory, considering the hydrodynamic interference effect of the transport ship on the floating crane, the time-domain coupling analysis model of the floating crane-lifting object double floating body system is established, the motion response of the floating crane and lifting object under four kinds of mooring schemes are studied, and combined with the dynamic response of the mooring line tension, the influence of the mooring system on the floating crane and lifting object is contrastively analyzed. It is indicated that: the motion response of the floating crane and lifting object is synchronous; when the transport ship is alongside the floating crane, the motion response of the floating crane and lifting object is small, which can effectively reduce the hydrodynamic interference of the transport ship to the floating crane.