复杂载荷下二元喷管静强度分析  

Static Strength Analysis of a Two-Dimensional Nozzle Under Complex Loads

作　　者：向鑫 李苑 朱敬德 许丹丹 XIANG Xin;LI Yuan;ZHU Jing-de;XU Dan-dan(School of Aircraft Engineering,Nanchang Aeronautical University,Nanchang 330063,China;AECC Guiyang Engine Research Institute,Guiyang 550081,China)

机构地区：[1]南昌航空大学飞行器工程学院,南昌330063 [2]中国航发贵阳发动机设计研究所,贵阳412002

出　　处：《失效分析与预防》2022年第3期141-145,161,共6页Failure Analysis and Prevention

基　　金：工信部重点实验室开放基金(GT202006394)。

摘　　要：航空发动机二元喷管的型面复杂,在发动机运行过程中受气动力、高温环境等影响,会在一些薄弱环节有一定的强度破坏风险。针对涡扇发动机大幅减重改进后的二元喷管,开展复杂环境载荷条件下的静强度分析,综合考虑高温、气动力、重力以及多方向综合过载。结果表明:二元喷管的减重优化设计满足强度要求;发动机气动力影响将大幅提高二元喷管最大应力值;最大应力出现在二元喷管圆转椭圆的加强筋处。相关研究结果可为二元喷管结构设计提供有效参考。The two-dimensional nozzle profile of aeroengine is complex,and it is also affected by aerodynamic force and high temperature environment during engine operation,resulting in a certain risk of strength failure in some weak links.In this work,the static strength analysis of a turbofan engine’s two-dimensional nozzle was carried out under the condition of complex environmental loads alongside the high temperature,aerodynamic force,gravity and multi-directional composite overload.The results show that the weight reduction optimization design of the two-dimensional nozzle meets the strength requirements;the maximum stress of two-dimensional nozzle will be significantly increased by the influence of engine aerodynamic force,and the maximum stress will appear at the stiffener of the circular to elliptical section.The relevant findings provide an effective reference for the design of the two-dimensional nozzle structure.

关 键 词：二元喷管 静强度分析 气动力载荷 结构优化 

分 类 号：V434.3[航空宇航科学与技术—航空宇航推进理论与工程]