대형 유조선 충돌 및 좌초 사고 시 잔류강도 추정식 개발

Abstract

Collided and grounded accidents account for more than half of all accident cases subjected to oil tanker. Such marine accidents cause structural damage to the ship and lead to marine pollution as well as life and financial loss. For preventing the loss of property and pollution, and preparing a countermeasure, it is needed to predict a residual hull girder strength after an accident regardless of someone’s special skills. The aims of this study are: I) To investigate the residual hull girder strength by quantitative approaches regarding to a damage location, II) To develop an empirical formula to calculate residual hull girder strength in association with a damage location. Three kinds of ship such as Very Large Crude-oil Carrier(VLCC), Suezmax and Aframax class double hull oil tanker are selected as target struck vessels. And, the Intelligent Supersize Finite Element Method(ISFEM) is applied to assess the residual hull girder strength of damaged structures by collision and grounding accidents. Based on the ISFEM results, an empirical formula for residual hull girder strength is developed. The developed formula, in this study, can be applied to anyone, and rapidly calculate its strength to prevent sequential events(Collapse, Fuel spill, etc.) after collision and grounding accidents.