ABSTRACT

The aim of the present paper is to investigate the ultimate strength characteristics of as-built ultra-large containership hull structures under combined vertical bending and torsional moments with varying the ship size. The intelligent supersize finite element method (ISFEM) is employed for the ultimate hull girder strength analyses. A total of three as-built containerships carrying 9,300 TEU, 13,000 TEU, and 22,000 TEU are studied. Based on the computations, ultimate strength interaction relationships of containership hull girders under combined vertical bending and torsional moments are also formulated by a curve fitting. Insights and structural design recommendations obtained from the study are summarised, which will be useful to not only enhance the ultimate limit state capacity of containership hull structures in existing sizes but also achieve the robust structural design of ultra-larger containerships which have never been built before.

摘要

本文的目的是研究在变化的船体尺寸的垂直弯矩和扭转力矩共同作用下，建成的超大型集装箱船船体结构的极限强度特性。智能超大型有限元方法（ISFEM）用于最终船体梁强度分析。总共研究了三艘建成集装箱船，分别载有9,300 TEU，13,000 TEU和22,000 TEU。在此基础上，还通过曲线拟合的方法，建立了集装箱船体梁在垂直弯矩和扭转弯矩共同作用下的极限强度相互作用关系。总结了从研究中得出的见解和结构设计建议，