Dynamic Response of Multi-Point Mooring Positioning System of a Moored Production Barge

Ship motion equations of multi-point mooring system are derived,in which the nonlinear restoring force terms are included.In three-dimensional dynamic response equations of cable-segment a lumped parameter model and average tangential vecter technique are adopted.The mooring calculation of a barge is carried out and numerical solution of the motion equations is given in the environmental force condition of wind,wave and current,the ship movement with time and the dynamic tension of mooring cable are also obtained.The effect of cable dynamics on ship motion and chain tensions are investigated and compared to the quasistatic results in the case without taking the effect of cable dynamic forces into account.