V型无压载水油船货舱中横剖面拓扑优化

Topology Optimization of Midship Section of Cargo Hold of V-Type Non-Ballast Water Tanker

为了优化V型无压载水油船的中横剖面结构,得到更加合理的结构型式,利用变密度法对其进行拓扑优化。选择合适的优化设计区域,以分段重量为约束条件,同时考虑实际生产建造工艺特点,以柔度值最小(即刚度最大化)作为目标函数建立拓扑优化数学模型。同时分析确定优化设计区域初始厚度不同对优化设计的影响,得到载荷的最佳传递路径。最后参考拓扑优化的结果得出新的强框架型式。结果表明,优化后的刚度较之前提高了6.8%,是更加合理的结构型式。对V型船中横剖面进行拓扑优化可在质量不增加的前提下提高其结构性能。

In order to optimize the midship section structure of V-type non ballast water tanker and obtain a more reasonable structure,the variable density method is used to optimize its topology.The optimal design area is selected.The weight of the section is taken as the constraint condition,and the characteristics of actual production are considered.The minimum flexibility value(i.e.maximum stiffness) is taken as the objective function to establish the mathematical model of topology optimization.The influence of different initial thickness of the optimal design area on the optimal design is determined,and the optimal load transfer path is obtained.Finally,referring to the results of topology optimization,a new type of strong frame is obtained.The results show that the stiffness after optimization is increased by 6.8%,which is a more reasonable structure.The topology optimization of V-shaped midship section can improve its structural performance without increasing its weight.