Influence of mooring rope characteristics on the horizontal drift oscillation of a moored ship

Harbour is a region where ships are moored in a relatively calm environment, but it is a region with dense ship traffic. Present study deals with analysis of forces and moment on a moored ship induced by a ship passing-by. The elasticity of a mooring rope depends on the material, construction, length and diameter of the rope. Fibre ropes are more elastic than steel ones. The effect of these factors of mooring system on drift motions of the moored ship are presented here for different combinations of mooring rope materials and lengths for a selected vessel combination and operating condition with the breaking strength requirement keeping constant. The mooring system used is a linear one and the coupling between modes of motion of the moored ship is neglected.