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基于传统结构优化设计方法,综合考虑结构参数和材料性能对涡扇发动机涡轮后框架性能的影响,提出涡轮后框架结构/材料一体化优化设计方法.将原设计问题分解为结构级优化和材料级优化,分别应用可行方向法和并行遗传算法进行求解.应用C语言开发了分布式并行优化设计平台.应用该平台对某型涡扇发动机涡轮后框架进行结构/材料一体化优化设计,得到最佳材料组合和结构参数.优化结果表明:与单一材料的结构优化方法相比,提出的结构/材料一体化优化方法进一步减少了结构的质量,算例中最优选材比最差选材质量减少29.0%.
Based on the traditional structural optimization design method, considering the influence of structural parameters and material properties on the performance of the turbine rear frame of a turbofan engine, an integrated optimization design method of the turbine rear frame structure / material is proposed. The original design problem is decomposed into structural optimization and material grade Optimization, and then apply the feasible direction method and the parallel genetic algorithm to solve respectively.The distributed parallel optimization design platform is developed by using C language.Using this platform, the structure / material integration optimization design of the turbine rear frame of a turbofan engine is obtained, and the optimal Material composition and structure parameters.The optimization results show that compared with the single material structure optimization method, the proposed structure / material optimization method further reduces the quality of the structure, the optimal material selection in the example is reduced by 29.0% .