Mooring force calculation of flexible berthed structures

Mooring force is studied according to the characteristics of open sea terminals structure.A mathematic model for calculating mooring forces is established based on energy method when the ship is subjected to external environmental loads.In addition,computer program is compiled.The relationships between mooring force and stiffness ratio of mooring line to moored platform are given for two external environmental conditions.Results show that stiffness ratio has a strong influence on mooring forces and then causes its redistribution.The change range of mooring force is in the average of around 10%.Therefore,the influence of stiffness ratio of mooring line to moored platform on mooring force should be considered when calculating mooring forces of open sea terminals structure.