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Acta Aeronautica et Astronautica Sinica ›› 2024, Vol. 45 ›› Issue (14): 229603-229603.doi: 10.7527/S1000-6893.2023.29603

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

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

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

CLC Number: