Advanced ship structural strength assessment of double hull tankers and bulk carriers

摘要

Some of the results of a comprehensive research project on ship structural safety carried out by Nippon Kaiji Kyokai (also known as ClassNK) in co-operation with several Japanese universities and ship research organisations in order to propose a rational, transparent and yet practical assessment method of ship structural strength to ship designers, ship operators and concerned parties in the maritime community are presented here. The significant findings presented in this paper include four different short-term sea states, practical formulae for design loads, a realistic fatigue assessment method considering the effect of mean stress, and a probabilistic simulation model of the corrosion process of ship structures. The details of a new direct strength analysis system incorporating the above findings are also described.