基于全局灵敏度分析的管路结构优化设计  

Optimization Design of Pipeline Structure Based on Global Sensitivity Analysis

作　　者：周洪民 沈兴铿 刘伟[3] 戴瑛[1] 贺鹏飞[1] ZHOU Hongmin;SHEN Xingkeng;LIU Wei;DAI Ying;HE Pengfei(School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China;Research Center for Special Aircraft Systems Engineering Technology,Ningbo Institute of Materials Technology and Engineering(NIMTE)of the Chinese Academy of Sciences(CAS),Ningbo 315336,Zhejiang,China;School of Mechanics and Civil Architecture,Northwestern Polytechnical University,Xi'an 710129,Shaanxi,China)

机构地区：[1]同济大学航空航天与力学学院,上海200092 [2]中国科学院宁波材料技术与工程研究所特种飞机系统工程技术研究中心,浙江宁波315336 [3]西北工业大学力学与土木建筑学院,陕西西安710129

出　　处：《力学季刊》2024年第4期941-952,共12页Chinese Quarterly of Mechanics

基　　金：上海市商用航空发动机领域联合创新计划项目(AR961);上海市双碳专项园区百千瓦级燃料电池综合能源系统关键技术研究与示范项目(21DZ1208800)。

摘　　要：针对航空发动机外部管路系统敷设优化设计问题,以发动机外部典型管路——Z型管路为例,采用灵敏度分析结合优化设计的方法,提高了管路的结构优化设计效率.本文首先以Z型管路的几何尺寸为基本参量,进行了管路固有频率和共振动应力的灵敏度分析.而后基于灵敏度分析结果,筛选基于方差的总灵敏度指标较大的参量作为优化参数,利用有限元软件得到了优化设计结果.最后通过管路振动试验,验证了优化结果的有效性.该研究通过灵敏度分析删选优化参数,大大降低了后续优化设计的计算量,通过避开共振点、降低共振应力的Z型管管型优化,验证了提出方法的有效性,该方法为发动机外部管路优化设计提供参考.To optimize the external piping system of an aircraft engine,a sensitivity analysis was performed on Z-pipes,a typical external component.The results indicate that both the efficiency and accuracy of the structural optimization design were significantly improved.First,the sensitivity of the natural frequency and resonant stress was analyzed based on the structural parameters of Z-pipes.Then,using the sensitivity analysis results,parameters with the highest total sensitivity index based on variance were selected for optimization.The optimal design was achieved through finite element analysis.Finally,the optimized design was validated through pipe vibration testing.This approach significantly reduced the computational effort required for optimization by eliminating less influential parameters during the sensitivity analysis.The method was proven effective in avoiding resonance and reducing resonant stress in Z-pipes,providing valuable insights for the optimization of external engine pipelines.

关 键 词：灵敏度分析 优化设计 Z型管路 动应力 固有频率 

分 类 号：V233[航空宇航科学与技术—航空宇航推进理论与工程]