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Experimental Study on Allowable Berthing and Mooring Conditions of An oil tanker

海洋工程：英文版 2003年第1期17卷 61-70页

作者：张日向刘忠波张宁川韩丽华 School of Civil and Hydraulic Engineering

When an oil tanker under the combined action of wind, waves and tidal current and is berthed or moored to a platform, the impact forces on the fenders and the tensile force in the mooring lines are important factors in the studies of berthing and mooring conditions. Based on the experiment of a berthing and mooring tanker model under the action of wind, wave and tidal current in the same direction, this paper studies the allowable berthing and mooring conditions by considering the tensile forces of mooring lines and impact forces on the fenders, as well as the impact energy on the fenders. And a method has been proposed here for motion amplitude analysis. A successful method to decrease impact forces on the fenders is put forward. Blowing in wind and blowing off wind and different angles between waves and the fenders are considered in the experimental study. In the berthing tests of the tanker model, the impact forces are measured and the impact energy is calculated, then the berthing conditions are determined. In the mooring tests of the tanker model, the mooring line tensile forces and impact forces are measured, and the allowable mooring conditions are given that will be useful to engineering design.

关键词： oil tanker berthing mooring model test

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A Correction Method on the Influence of Free Surface on Curve of Statical Stability

A Correction Method on the Influence of Free Surface on Curv...

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作者： MA Kun, CHEN De-zhi (Ship CAD Engineering Center, Dalian University of Technology, Dalian 116024, China)

A Correction method is proposed to calculate the influence of free surface on large inclining angle stability by using the maximum inclining moment. Based on hydrostatics, a computer program is developed to calculate the influence of free surface on righting arm curve, which can rapidly and accurately calculate the inclining moments caused by the movement of the free surface in any shape of liquid tanks at any loading rates and heel angles. The calculation accuracy is compared with the Regulation Correction Method. The result shows that this method is reasonable, reliable and practicable.

关键词： ship engineering oil tanker shape of liquid tank free surface maximum inclining moment

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