飞机平尾普通肋的优化设计

在飞机平尾普通肋的轻量化设计过程中，采用桁架肋代替传统的腹板肋，并利用HyperWorks的OptiStruct模块对桁架肋进行详细的尺寸优化和形状优化.优化设计时以结构质量最小为目标函数，以肋缘条与斜支柱的截面参数为设计变量，以von Mises应力和临界屈曲因子为约束条件.优化后的桁架肋质量比原腹板肋约减少29%，表明采用该方法对飞机平尾结构进行轻量化设计可行.

Optimization design on horizontal stabilizer ribs of aircraft

During the lightweight design on aircraft horizontal stabilizer ribs, the truss rib is used to replace the traditional web rib, and a detailed size and shape optimization is performed by OptiStruct in HyperWorks. During the optimization design, the objective function is the minimization of structure mass, the design variables are the section parameters of rib cap and diagonal truss member, and the constraint conditions are the von Mises stress and the critical buckling factor. The mass of the optimized truss rib is approximately reduced by 29%. It shows that it is feasible to use the method to perform the lightweight design on aircraft horizontal stabilizer.