基于梁单元和板壳单元混合建模的折叠椅轻量化设计

摘要

To enhance the utilization ratio of the skeleton material of the folding chair and reduce the mass and production cost of the folding chair, this paper designs a light folding chair. The finite element analysis method is used to build the model of its beam and shell and obtain the stress distribution of the folding chair under the extreme attitude. On this basis, it takes the section size of its main component as the design variable,the strength and rigidity as the constraint condition and its lightest mass as the optimization goal to optimize its structure design.After its optimization,the mass of the folding chair is reduced by 40%.It is proved that its static characteristics meet the requirements of its strength and rigidity.%为增加折叠椅骨架材料利用率,减轻折叠椅质量,降低折叠椅生产成本,以某款折叠椅为研究对象进行轻量化设计.对折叠椅进行梁、板壳单元混合建模,应用有限元分析方法获得折叠椅在极限姿态下的应力分布.在此基础上,以折叠椅主要构件的截面尺寸为设计变量,以强度、刚度为约束条件,以折叠椅质量最轻为优化目标,对其进行结构优化设计,优化后折叠椅的质量减轻了40%,经极限姿态下的静态特性验证表明其满足强度和刚度要求.