柔性设计在汽车滚装船上的应用

  目的  研究汽车滚装船在斜菱状态下的横向强度问题。  方法  设计7种不同柔性支撑甲板结构方案，利用有限元软件MSC.PATRAN/NASTRAN，计算船体结构的应力及分布，比较分析不同设计方案下对舱段结构强度的影响。根据挪威船级社（DNV）指导性文件，对不同设计方案下汽车滚装船舱段的结构强度进行评估。  结果  结果表明：不同柔性支撑甲板初始层位置的设定会对船体结构强度产生一定影响，并在柔性支撑甲板与刚性支撑甲板分界处出现应力明显增大的现象。  结论  研究结果可为同类型船舶的设计建造提供参考意见。

Application of flexibility design in car roll on/roll off ship

  Objectives  The problem of transverse strength of car Ro-Ro ship under racking condition is studied.  Methods  seven kinds of flexible support decks were designed based on the finite element software MSC PATRAN/NASTRAN to study the influence of different flexible support decks on the structural strength of car Ro-Ro ships. According to the guidance document of Det Norske Veritas(DNV), the structural strength of the car Ro-Ro ship cabin of different designs was evaluated. By analyzing the stress magnitude and distribution of the hull structure, the influence of different flexible support deck designs on the strength of the structure of the car Ro-Ro ship cabin was compared.  Results  Results show that different position of the initial layer of the flexible support deck will have a certain impact on the strength of the hull structure, and there is a phenomenon of significantly increased stress in the area between the flexible support deck and the rigid one.  Conclusions  The study in this paper can provide reference for the design and construction of similar ships.