This paper studies the structural strength of different car Ro-Ro ships which are designed by flexible and rigid decks and subjected to symmetric loadings in the upright condition. 7800 units large PCTC has been taken as the research object, which two kinds of cargo hold FE models have been built based on flexible and rigid design of vehicle deck, by using the finite element software MSC?PATRAN. The FE modes are extended to 1/2 hold both in aft and fore direction on basis of 1 hold in the middle. And then, in accordance with the guidance of the Det Norske Veritas and rules of the Registro Italiano Navale apply the same load cases on both different models, to calculate and analyze the structural strength of the ships by using MSC?NASTRAN solver. This article explores the stress magnitude, the distribution of hotspots and the deflection deformation of main hull structure, to compare the difference between the two design concepts on the structural strength. Finally, summarizes their respective advantages and disadvantages and hopes to provide reference for the design and construction of the car Ro-Ro ships.
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机译：本文研究了不同汽车RO-RO船舶的结构强度，由柔性和刚性甲板设计，并在直立状态下进行对称载荷。 7800个单位大型PCTC作为研究对象，通过使用有限元软件MSC的柔性和刚性设计，建立了两种货物持有FE模型，通过使用有限元软件MSC来构建了车辆甲板的灵活性和僵硬的设计。在中间的1个持有的基础上，Fe模式延伸至1/2，既左右，均为1举行。然后，按照DERN NORSKE VERITAS的指导和Registrane Italiano Navale的规则在两种不同型号上应用相同的负载箱，通过使用MSC来计算和分析船舶的结构强度。本文探讨了应力幅度，热点分布和主船体结构的偏转变形，比较了两个设计概念对结构强度的差异。最后，总结了各自的优缺点，希望为汽车RO-RO船舶的设计和构造提供参考。
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