为了开发具有优良防火和承载性能的新型轻量化围壁结构,替代上层建筑区域的传统加筋防火围壁,提出一种基于形貌优化技术的邮轮轻型防火围壁设计方法.基于该方法设计的轻型围壁中波纹加筋的位置和数量是根据承载要求及加工工艺要求生成,克服了常规波纹围壁设计中波纹位置和数量均已事先确定的缺点.针对指定设计区域,以邮轮防火围壁结构轻量化为目标函数,以焊缝区结构应力、非焊缝区结构应力以及围壁一阶屈曲因子为约束条件,建立了邮轮防火围壁形貌优化设计模型并求解.提取形貌优化结果得到可行的邮轮防火围壁构型,经二次设计得到最终构型,并与传统加筋防火围壁的力学性能进行了比较.结果表明,新型邮轮防火围壁与传统加筋防火围壁相比具备轻量化优势和良好的强度.

In order to develop a new lightweight enclosure structure with an excellent fireproof and bearing performance, and to replace the traditional stiffened fire enclosure bulkheads in the superstructure area, a design method of light fireproof enclosure bulkheads for cruise ship based on the topography optimization technology was proposed. The location and numbers of corrugated beads in lightweight wall designed by this method were generated according to the requirements of load bearing capacity and manufacturing process, and this method overcomes the disadvantages that the location and numbers of beads in the design of conventional corrugated wall have to be determined in advance. Aimed at the specified design regions, the lightweight of cruise fireproof enclosure bulkheads (CFEB) structure was taken as the objective function while the stress in the weld zone, the stress in the nonweld zone, and the first-order buckling factor of CFEB were taken as constraints. Then, the topography design models of CFEB were established and solved. Feasible configurations were obtained by topography optimization, and the final configurations of CFEB were formed by secondary design. The mechanical properties of the final configurations were compared with the traditional stiffened fireproof bulkheads. It is concluded that the new CFEB has advantages of lightweight and good strength compared with the traditional stiffened fireproof bulkheads.