航空发动机支架增材制造轻质设计研究

Optimization Design of Aero Engine Support Based on Additive Manufacturing

零部件的轻量化对提升航空航天装备效能意义极大,传统的制造技术难于满足小批量多品种零件的轻量化制造需求,而增材制造技术的发展为航空航天零部件的个性化制造打开新局面。本文以某型航空发动机附件支架为例,研究其受载荷的应力和变形情况、分析其传力路径,采用构型拓扑化的思路结合增材制造工艺特点,按传力路径优化材料分布和结构设计。结果表明优化后减重22.6%,一阶固有频率提高到279.9Hz,满足指标要求。面向增材制造优化的支架满足轻量化、集成化、功能结构一体化要求,本文所述的设计思路具有推广和借鉴意义。

The light-weighting design is of great significance for improving the efficiency of aerospace components.The traditional technology of manufacturing is difficult to meet the light-weighting manufacturing requirement for multi-breed batch components,but the development of additive manufacturing technology has opened up a new prospect for the individuation manufacturing of aerospace components.This paper takes the bracket of aero-engine for example,studying its stress and deformation and analyzing its force transferring path.In this paper,the thoughts of configurational topologization combine with technology characteristics of additive manufacturing,and the material distribution and structural design are optimized basing on the force transferring path.The results show that the bracket after optimized design loses 22.6%and its first nature frequency increases to 279.9Hz,which meets the standard requirements.It is of great spreading and learning significance for the optimized bracket via additive manufacturing technology,which meets the requirements of light-weighting and integration of function and structure.