Mooring Safety Improvement And Berth Length Optimization Of Open-Sea Oil Terminal

The mooring safety and berth length optimization of open-sea terminals are complex problem, because of severe natural conditions of wind, wave and current around these terminals. And the chance of mooring lines broking will get higher and has the great harm to the ships, especially the large oil tankers. Therefore, researches on mooring safety improvement and berth length optimization are necessary for large-scale oil terminal at open sea. This dissertation conducts a series of mathematical experiments to mooring safety improvement and berth length optimization, taking a 300000-DWT open-sea oil terminal as example. Then the primary achievements of this dissertation includes as follows:(1) The relationships between mooring line characteristics, natural conditions and mooring safety are investigated using control variable methods. Characteristics of mooring line including the on-deck line length, mooring tail, its diameter and material are considered first, then natural conditions such as wave period, wave direction, wave height and flood velocity are also included. Finally, the mooring pattern and adverse conditions are determined, which will provide valuable information for berth length optimization.(2) Berth length optimization mathematical experiments are carried. Mathematical experiments are designed for 5 representative berth lengths based on the determined mooring pattern and adverse conditions. The research will provides a guide for berth plane layout and structural design in practical engineering.Finally, a summary is given and some problems to be further studied are discussed.