航空学报 > 2024, Vol. 45 Issue (14): 229603-229603   doi: 10.7527/S1000-6893.2023.29603

战斗机进气道结构声疲劳设计方法

牟彬杰1(), 蒋劲松1, 杨堃2, 付焕兵1, 孟德虹3, 金伟1   

  1. 1.航空工业成都飞机设计研究所,成都 610091
    2.中国飞机强度研究所,西安 710000
    3.中国空气动力研究与发展中心,绵阳 621000
  • 收稿日期:2023-09-18 修回日期:2023-10-09 接受日期:2023-12-22 出版日期:2024-07-25 发布日期:2024-01-17
  • 通讯作者: 牟彬杰 E-mail:21381495@qq.com
  • 基金资助:
    国家级项目

Acoustic fatigue design method for fighter inlet structure

Binjie MOU1(), Jinsong JIANG1, Kun YANG2, Huanbing FU1, Dehong MENG3, Wei JIN1   

  1. 1.AVIC Chengdu Aircraft Design & Research Institute,Chengdu 610091,China
    2.Aircraft Strength Research Institute of China,Xi’an 710000,China
    3.China Aerodynamics Research and Development Center,Mianyang 621000,China
  • Received:2023-09-18 Revised:2023-10-09 Accepted:2023-12-22 Online:2024-07-25 Published:2024-01-17
  • Contact: Binjie MOU E-mail:21381495@qq.com
  • Supported by:
    National Level Project

摘要:

先进战斗机S型进气道的内流场分离使进气道薄壁结构承受严重的振动噪声载荷,对进气道蒙皮及支撑结构的声疲劳寿命影响极大,增加了战斗机的维护维修成本。因此,S型进气道结构抗声疲劳动强度设计是新一代先进战斗机的设计难点。针对战斗机进气道结构声疲劳问题,从气动噪声预计、声振耦合动响应分析方法、进气道有限元快速建模方法以及结构声疲劳寿命预计等方向开展了系统的研究,建立了进气道抗声疲劳设计方法,并通过试验验证,分析结果与试验一致性良好,为战斗机进气道结构强度设计提供了有效的技术手段。

关键词: S型进气道, 声疲劳, 气动噪声预计, 声振耦合, 寿命预计

Abstract:

The thin-walled structure of an advanced fighter inlet experiences severe vibration and noise loads due to the internal flow field separation in the S-shaped inlet, resulting in limited fatigue life of the inlet skin and supporting structure and thus increased maintenance cost. Therefore, the S-shaped inlet design against acoustic fatigue is a key challenge in the structural design of next-generation fighters. This study establishes a design method to combat inlet acoustic fatigue based on an analysis of the aerodynamic noise prediction method, the acoustic-vibration coupling analysis method, the fast finite element inlet modeling method, and acoustic fatigue life prediction. The proposed method is verified by experiments, with results demonstrating good agreement with the analysis results, and provides an effective technical means for the dynamics strength design of fighter inlet structures.

Key words: S-shaped inlet, acoustic fatigue, aerodynamic noise prediction, acoustic-vibration coupling, life prediction

中图分类号: