航空学报 > 1996, Vol. 17 Issue (3): 368-372

飞机主梁疲劳裂纹萌生声发射信号的识别方法

耿荣生1, 景鹏1, 雷洪1, 李伟2, 邵进2   

  1. 1. 空军第一研究所,北京,100076;2. 北京燕山石化公司锅炉压力容器检验所,北京,102549
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1996-06-25 发布日期:1996-06-25

IDENTIFICATION OF ACOUSTIC EMISSION SIGNALS PRODUCED BY FATIGUE CRACK INITIATION IN WING SPARS OF AIRCRAFT

Geng Rongsheng1, Jing Peng1, Lei Hong1, Li Wei2, Shao Jin2   

  1. 1. P.O.Box Beijing 9203 16,Beijing,100076;2. Beijing Yan Shan Pet rochemical Corp. ,Beijing, 102549
  • Received:1900-01-01 Revised:1900-01-01 Online:1996-06-25 Published:1996-06-25

摘要: 提出利用多参数识别和相关技术在高背景噪声环境下获取裂纹萌生所产生的声发射信号,并在试验进行到近 5 0 0 0 fh时预报出主梁螺栓孔长度不足 0 .5 mm裂纹的萌生

关键词: 声发射, 疲劳裂纹, 多参数识别, 相关分析

Abstract: An attempt has been made to use acoustic emission (AE) to monitor the initiation and growth of fatigue cracks of aircraft under fullsize fatigue test.Multi\|parameter identification and correlation techniques are proposed to distinguish between genuine (crack\|related) AE signals and background noises.The initiation of a fatigue crack of less than 0.5mm was predicted in time.

Key words: acoustic emission (AE), fatigue crack, multiparameter ident ification, correla tion

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