• CN:11-2187/TH
  • ISSN:0577-6686

›› 2003, Vol. 39 ›› Issue (9): 128-132.

• 论文 • 上一篇    下一篇

利用模态声发射技术监测飞机主结构件的日历损伤?

耿荣生   

  1. 北京航空工程技术研究中心
  • 发布日期:2003-09-15

EVALUATION OF CALENDAR DAMAGE OF AIRCRAFT MAIN STRUCTURES USING MODAL ACOUSTIC EMISSION

Geng Rongsheng   

  1. Beijing Aeronautical Technology Research Centre
  • Published:2003-09-15

摘要: 研究了腐蚀特别是点腐蚀过程产生声发射(AE)的源机制及AE信号特点,推导了AE信号幅度与腐蚀深度及频率的关系,并说明该关系对利用AE技术监测腐蚀损伤的意义。论述了利用模态声发射(MAE)技术识别腐蚀AE信号的理论根据,介绍了利用MAE技术对飞机主结构件日历损伤进行评估的方法。基于试验获得的航空用铝合金材料在加速腐蚀过程中的声发射信号与腐蚀损伤的关系对研究材料损伤程度与声发射强度之间的内在联系有重要意义。试验表明,腐蚀能远在被肉眼发现之前即可很方便地用AE仪器检测,利用AE技术探测早期腐蚀、研究腐蚀发展规律、监测和评估腐蚀损伤具有极其良好的应用前景。

关键词: 飞机, 腐蚀, 腐蚀损伤, 模态声发射(MAE), 声发射(AE)

Abstract: Studies are made on the source mechanism and characteristics of acoustic emission (AE) signals produced by corrosion, especially pitting corrosion. Relationship between AE amplitude and corrosion depth and frequency is deduced, and the significance of the relation in estimating corrosion damage is emphasized. Theoretical basis for using modal AE to identifying corrosion-related AE and background noise is introduced, and methods for using modal AE to evaluate calendar damage of aircraft main structures are outlined. Relationship between corrosion damage and AE parameters is obtained through accelerating corrosion test, showing the great potential of using AE to detect early corrosion, to monitor corrosion development, and to evaluate corrosion damage.

Key words: Aircraft, Corrosion damage, Acoustic emission(AE), Corrosion, Modal acoustic emission(MAE)

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