邮轮非常规阶梯甲板极限承载力研究

Study on ultimate bearing capacity of unconventional stepped deck in cruise ship

[目的]为了探究邮轮异型甲板结构的强度底数,针对邮轮剧院布置使用的非常规阶梯甲板进行极限承载力研究。[方法]基于ABAQUS准静态方法计算阶梯甲板的极限承载力,确定结构的薄弱位置,并与常规甲板失效模式进行对比,同时探究甲板、纵骨、纵桁腹板以及纵桁面板厚度变化对结构极限承载力的影响,提出支柱加强和纵桁加强两种结构优化方法。[结果]结果表明:阶梯甲板的失效主要发生在高度差最大的层交界处,极限承载力较常规甲板大幅下降,对应的压缩位移和塌陷深度明显增大;极限承载力会随甲板、纵骨、纵桁腹板以及纵桁面板厚度的增大而增大,其中纵桁腹板厚度变化的提升效果最显著;在结构薄弱位置增设支柱,或增大该处纵桁腹板高度能有效提高结构的极限承载力。[结论]所做研究对指导现代邮轮特殊甲板的设计和优化具有重要意义。

[Objective]In order to determine the strength of the special deck structure of a cruise ship,this study investigates the ultimate bearing capacity of an unconventional stepped deck used in the layout of the cruise theater.[Methods]Based on the quasi-static ABAQUS method,the ultimate bearing capacity of a stepped deck is calculated and the weak positions of the structure are determined and compared with conventional deck failure modes.Meanwhile,the influence of the deck,longitudinal frame,girder web and girder panel thickness on the ultimate bearing capacity of the structure are investigated,and two structural optimization ideas are proposed:pillar reinforcement and longitudinal reinforcement.[Results]The results show that the failure of the stepped deck mainly occurs at the boundary of the layer with the largest height difference;the ultimate bearing capacity of the stepped deck decreases significantly compared with that of a conventional deck;and the corresponding compression displacement and collapse depth increase obviously.The ultimate bearing capacity increases with the thickness of the deck,longitudinal frame,girder web and girder panels,and the improvement effect of girder web thickness is the most significant.The ultimate bearing capacity of the structure can be effectively improved by adding struts or increasing the height of the web in the weak position of the structure.[Conclusion]This study has great significance for the design and optimization of special decks for modern cruise ships.