极地邮轮甲板结构的冗余度分析

Redundancy Analysis of the Polar Cruise Deck Structure

按照国际海事组织(International Maritime Organization, IMO)对船舶结构冗余度的要求,基于加筋板损伤假定,提出一种邮轮甲板结构冗余度验证方法,包括邮轮甲板结构冗余度准则、损伤假定、载荷情形和非线性有限元分析等内容。采用该方法对不同上层建筑参与度下极地邮轮甲板结构的冗余度进行验算。计算结果符合法国船级社《Rules for the Classification of Steel Ships》的加筋板屈曲失效准则,邮轮甲板结构能满足冗余度要求,即“任何加筋结构构件的局部损伤(如局部永久变形、断裂或焊缝失效)不会立即导致整个加筋板格垮塌”。该研究可供邮轮的结构冗余度设计参考。

This paper proposes a method for verification of cruise deck structural redundancy in accordance with the rules of International Maritime Organization(IMO)on ship structural redundancy and based on the damage assumption of stiffened plates,which includes cruise deck structural redundancy criteria,damage assumptions,load conditions,nonlinear finite element analysis,etc.Using the proposed method,the redundancy check of the deck structure of the polar cruise ship with different participation degrees of the superstructure is carried out.The calculation results show that the designed deck structure of the cruise ship complies with the buckling failure criteria of stiffened plates in the Rules for the Classification of Steel Ships(RSS)of Bureau Veritas and meets the redundancy requirements,that is“the local damage of any stiffened structural member(such as local permanent deformation,fracture or weld failure)will not immediately lead to the collapse of the entire stiffened panel”.The research work provides a theoretical support for the redundancy design of cruise ship.