Abstract: In the current study, the overall finite element analysis of an ideal Panamax passenger ship is carried out in order to examine the deformation characteristics of luxury cruise ships under the ultimate state and the influence of the initial geometrical imperfection. It is found that the deformation of the superstructure and the main hull at the midship is in the way of double plane section. A method for calculating the ultimate strength of luxury cruise ships is accordingly proposed by using the finite element model between the columns, assuming that the superstructure and the main hull bend and revolve around their respective centroids referring to the "double beam theory". The accuracy of this method is obviously improved by comparing with the conventional finite element method for calculation of ultimate strength.

Key words: main hull, superstructure, double beam theory, double plane section, ultimate strength, finite element simulation

摘要： 为揭示豪华邮轮极限状态的变形特征,考察初始几何缺陷的影响,文章对一艘理想的巴拿马客船进行整船有限元分析,发现船舯位置上层建筑与主船体以双平截面的方式变形。鉴此,参考“双梁理论”假设上层建筑与主船体绕各自形心受弯转动,提出了一种利用柱间有限元模型进行豪华邮轮极限强度计算的方法,对比经典的极限强度有限元计算方法,精度有明显改进。

关键词: 主船体, 上层建筑, 双梁理论, 双平截面, 极限强度, 有限元模拟