面向增材制造的内置流道一体化支架拓扑优化设计  

Topology optimization design of integrated bracket withembedded pipelines for additive manufacturing

作　　者：袁迪野 吕宇超 李志立 周莹[1] 高彤[1] 梁树强[2] 张卫红[1] YUAN Diye;LYU Yuchao;LI Zhili;ZHOU Ying;GAO Tong;LIANG Shuqiang;ZHANG Weihong(State IJR Center of Aerospace Design and Additive Manufacturing,Northwestern Polytechnical University,Xi’an 710072,China;Xi’an Aerospace Propulsion Institute,Xi’an 710100,China)

机构地区：[1]西北工业大学航宇材料一体化设计与增材制造装备技术国际联合研究中心,陕西西安710072 [2]西安航天动力研究所,陕西西安710100

出　　处：《火箭推进》2023年第4期36-42,共7页Journal of Rocket Propulsion

基　　金：国家自然科学基金项目(12172294,12032018)。

摘　　要：针对星载发动机一体化支架必须同时满足流道功能、承载、工艺要求的轻量化设计问题,提出了一种面向增材制造的内置流道结构拓扑优化设计流程。将内置流道功能型面保留并作为非设计区域,建立一体化支架设计模型;在满足轻量化要求下以提高力学性能为目标,利用拓扑优化获取结构的主传力路径,完成优化构型的模型重构;以保证流道内表面加工质量为依据,确定一体化支架增材制造打印角度,进而对支撑结构的去除工艺性进行分析,完成了全尺寸样件制造。有限元分析结果和样件加工过程表明:一体化支架优化设计方案内置流道的加工质量、结构的强度和刚度性能均满足设计要求,打印结构支撑易去除、工艺性好,较原设计方案减质40.6,优化设计减质效果显著。Aiming at the lightweight design problem for the spaceborne engine integrated bracket to meet simultaneously the fluid flow,load bearing and manufacturing requirements,an additive manufacturing oriented topology optimization design process of structures with embedded pipelines was proposed.The design model was established where the functional surface of the pipelines was retained as the non-designable region.The main load-transmission path was obtained by topology optimization for lightweightness and high performance.The final structure was obtained by model reconstruction based on the optimized configuration.The printing angle for additive manufacturing was determined to ensure the inner surface quality of embedded pipelines.A full-size structure was additively manufactured and the removal of support structures was analyzed.It is shown that the manufacturing quality of embedded pipelines,the strength and stiffness of integrated bracket all meet the design requirements.The support structure can be easily removed and the manufacturing processability is good.A significant mass reduction of 40.6 is obtained compared with original structure.

关 键 词：一体化支架 内置流道 结构优化 拓扑优化 增材制造 

分 类 号：V431[航空宇航科学与技术—航空宇航推进理论与工程]