AE Monitoring of Damages of Central Wing and Outer Panel Jointing Area During Full-scale Aircraft Body Fatigue Test
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摘要: 中央翼-外翼连接区域是某型飞机全尺寸疲劳试验需特别关注的部位，其中 10 mm垂直方向对接销钉和孔以及 12 mm水平方向对接螺栓和孔等，或因形状特殊无法使用超声波探伤，或者因不可达而无法应用常规无损检测技术检查。介绍了使用声发射技术对该部位的跟踪监测。利用趋势分析、基于时间、空间的滤波和基于幅度和能量分布等多种信号处理方式，以及多参数综合识别技术，对这些关键部位的状态进行了声发射连续跟踪监测，为保证机体部件疲劳试验的顺利进行起到重要作用。Abstract: The central wing and outer panel jointing area was the key structure to be monitored during the full-scale aircraft fatigue test. The 10 mm vertical and 12 mm horizontal bolts, and their corresponding holes, were of special concern during the test because of the difficulties faced by conventional non-destructive testing means to inspect them and evaluate their damages. Due to the inaccessibility, complex structures and very high sound wave attenuation of these parts, the work of AE monitoring was confronted with great difficulties and high challenges. By using the combination of trend analysis, time-based, amplitude-based, and spatial filtering techniques, respectively, together with multi-parameter identifications, real time monitoring of these critical structures was realized. The AE monitoring played an important role for the fulfillment of the fatigue test.
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Keywords:
- Acoustic emission testing /
- Full scale aircraft /
- Fatigue test /
- Fatigue damage /
- Trend analysis
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