发动机附件支架多工况拓扑优化研究

文章采用Optistruct软件提供的优化方法,对某发动机附件支架进行多工况拓扑优化分析;以附件布置的剩余空间为基础创建初始结构,并对其实施静态和模态分析;依据计算结果及设计要求实施以位移和模态频率为约束条件的拓扑优化分析;参考优化后的最优拓扑并结合工艺要求,确定支架设计方案并对其进行验算.实践证明,该方法能有效地在有限的空间内给出质量最轻、刚度最大的支架结构.

Study on topology optimization of the engine accessory bracket under multiple loading cases

Topology optimization of an engine accessory bracket is conducted by using the method offered by the Optistruct software.An initial structure is created based on the interspace left by the layout of accessories,and multiple static and modal analyses are carried out in order to obtain basic stiffness and modal information.Then a model which minimizes the structural weight with the displacement and frequency constraints for multiple loading cases is defined.The simulation yields an optimal topology.According to the optimal topology and some other factors,a new design is created and FEA is made to validate the design.The results show that the method can offer an accessory bracket light in weight and maximum in stiffness.