机载蒸发循环系统结构的轻量化设计

Lightweight Design of Airborne Evaporation Circulatory System Structure

机械结构作为机载蒸发循环系统主要的支撑件,具有较大的质量并承受来自直升机的振动冲击作用,其结构性能影响着整个系统的正常功能,在保证足够强度和刚度的前提下,对结构进行轻量化设计具有重要的理论意义和实用价值。首先,采用ANSYS软件对机载蒸发循环系统进行有限元分析;然后,借助Pro/E与Ansys Workbench之间的双向参数实时传递功能,对结构进行参数化设计,在此基础上采用灵敏度分析法获取对模型优化目标影响较大的关键尺寸参数;最后,采用多目标遗传算法对结构进行优化设计。结果表明:在满足设计要求的前提下,结构质量比原来减少了24.4%,得到了最佳结构参数,实现了轻量化目的。

Mechanical structure,as the main support of airborne evaporation circulatory system,has great mass and subject to the vibration impact from the helicopter.Its performance affects the normal function of the whole system.On the premise of guaranteeing sufficient strength and rigidity of structure,lightweight design is of important theoretical significance and practical value.Firstly,the finite element analysis of airborne evaporation circulatory system is carried out by using ANSYS software.Then the structure is parametric designed by using real-time transfer function of parameters between Pro/E and Ansys Workbench.The critical dimensions of parameters model are got by using the sensitivity analysis,which are of more influence on the optimization goal.Finally,the multi-objective genetic algorithm is adopted to design its structure.Results show that the weight is reduced to 24.4% of the original structude.The optimal structure parameters are obtained to realize the lightweight of the structure.