舱室浮动地板多参数优化方法

Multi Parameter Optimization Method of Cabin Floating Floor

浮动地板通常由加筋板与岩棉夹芯板组成。通过耦合加筋板模型与岩棉夹芯板模型的公共有限元节点建立耦合模型,基于Optistruct进行加筋板加筋分布的拓扑优化,并根据优化结果设计出质量最小与力学性能最优的十字型加筋板结构。以最小质量为目标,以静力学、振动性能为约束在Optistruct中对耦合模型中镀锌钢板厚度、甲板厚度、T型钢腹板厚度、T型钢面板厚度、T型钢面板宽度、岩棉板等效刚度、岩棉板附加质量等参数进行优化,并通过相同质量下耦合模型与非耦合模型优化后力学性能对比分析加筋板和岩棉板的耦合作用。通过对比中型邮轮常用甲板加强筋规格范围中不同腹板高度优化后的结果并校核力学性能后发现,腹板高度120mm时综合力学性能较好,且整体减重效果最佳,可达6.477%。

The floating floor of ships is usually composed of stiffened panels and rock wool sandwich panels.A coupling model is established by combining the common finite element nodes of stiffened panel model and rock wool sandwich panel model.The topology optimization of the stiffener distribution for stiffened plate is carried out based on Optistruct,and a cross shaped reinforced plate structure with the minimum mass and the best mechanical performance is designed according to the optimization results.The coupling model parameters such as galvanized steel plate thickness,deck thickness,T-shaped steel web thickness,T-shaped steel panel thickness,T-shaped steel panel width,equivalent stiffness of rock wool panel,and additional mass of rock wool panel in the coupling model is optimized with the goal of minimum mass and constrained by statics and vibration performance in Optistruct,and the mechanical properties of the optimized coupling model and non coupling model under the same mass are contrasted to analysis the coupling effect of the reinforced board and rock wool board.By comparing the optimized results of different web heights in the commonly used deck reinforcement specifications of medium-sized cruise ships and verifying their mechanical properties,it is found that the comprehensive mechanical performance is better when the web height is 120 mm,and the overall weight reduction effect isthe best,reaching 6.477%.