On the mooring line tension of the tanker by dolphin mooring in wind and waves

The estimation of the mooring tension of moored vessels in the harbor and port is important for keeping its position especially in wind and waves during loading or unloading of the dangerous cargo such as oil and chemical. The oil tankers are usually moored by the dolphin mooring. The model experiment of the moored tanker by the dolphin mooring was carried out in wind and waves. The mooring system mainly consists of 4 mooring lines and 2 fenders. 4 mooring lines consist of bow line, stem line and 2 spring lines. The mooring system of 6 mooring lines was compared with that of 4 mooring lines. The effect of the number of mooring lines, mooring line material, wind and wave direction on the mooring tension was investigated. The experimental results were compared with the numerical calculation.