拓扑优化技术在复杂内流道壳体轻量化设计中的应用研究

Research on the application of topology optimization technology in lightweight design of complex internal flow channel shells

针对拓扑优化技术在带有复杂流道类型壳体轻量化设计中的应用展开技术研究。分析了普通航空航天用结构件、薄壁件的拓扑优化方法不适用于带有复杂流道类型壳体的原因,梳理了带有复杂流道类型壳体的设计特点,提出一种拓扑优化技术在该类壳体轻量化设计中应用的可能性。以航空发动机应急放油附件壳体为研究载体,开展了拓扑优化技术在该类壳体轻量化设计中应用的研究,以兼顾传统加工工艺和增材制造工艺为设计目标,完成了该应急放油附件的轻量化设计。通过研究,梳理了该类壳体的轻量化设计流程,总结提炼了基于在已有模型和新设计模型轻量化设计两种应用场景下的设计方法,阐述了现阶段拓扑优化技术在该类壳体应用中的技术瓶颈与不足,提出了优化软件的改进方向。

The topology optimization technology in the lightweight design of shells with complex flow channels was studied.The reasons why topology optimization methods for structural and thin-walled parts used in ordinary aerospace were not applicable to shells with complex flow channels were analyzed.The design characteristics of shells with complex flow channels were summarized,and a possibility of applying topology optimization technology in the lightweight design of such shells was found.A study was conducted on the application of topology optimization technology in the lightweight design of an emergency oil discharge accessory shell for an aircraft engine.In order to balance traditional processing and additive manufacturing processes,the lightweight design of the emergency oil discharge accessory was completed.The lightweight design process of this type of shell was studied,and design methods based on existing models and new design models were summarized and then refined in two application scenarios.The tecwhnical challenges and shortcomings of topology optimization technology in the current application of this type of shell were explained,and improvement directions for optimization software were proposed.