Surface acoustic wave testing of crack in aircraft hydraulic pipe
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摘要: 针对飞机液压导管的疲劳裂纹提出了一种超声表面波检测方法,根据裂纹形貌及导管端头的结构特点,设计制作了对比试样和频率为7.5 MHz的四通道表面波聚焦探头,匹配专用夹具工装和高信噪比的四通道探伤仪可实现长为3 mm,深为0.1 mm的平管嘴根部缺陷以及长为3 mm,深为0.14 mm的喇叭口根部缺陷的检测。该方法解决了导管内液压油、装配及遮挡等多种因素的干扰问题,达到了操作便捷和检测结果可靠的目的,满足了在役检测的需求,可为同类型薄壁导管的检测提供借鉴。Abstract: Surface acoustic wave testing was proposed for fatigue crack in aircraft hydraulic pipe. According to the crack morphology and the structural characteristics of pipe head, reference samples and four-channel surface wave focusing probes of 7. 5 MHz were designed and manufactured. After matching special fixture and four-channel instrument with high signal-to-noise, the root defect of smooth nozzle with length of 3 mm and depth of 0. 1 mm, and the root defect of bell mouth with length of 3 mm and depth of 0. 14 mm can be well detected. This method solves the interference of hydraulic oil, assembly and shielding in the pipe, realizes the purpose of convenient operation and reliable detection results, satisfies the requirements of in-service testing, which can provide reference for testing of the same type of thin-walled pipes.
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Keywords:
- thin-walled pipe /
- crack /
- surface wave /
- in-service testing
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[1] 刘红. 飞机液压导管开裂分析[J].失效分析与预防,2009,4(4):229-233. [2] 刘学文, 范鑫,舒送.某型飞机液压导管裂纹原因分析及预防措施[J].航空维修与工程,2017(2):76-79. [3] 李彪, 罗峰. 飞机液压导管在维护中易发生的差错及预防措施[J]. 装备维修技术, 2019,171(3):161. [4] 许占显, 潘卫国.飞机导管检测工艺研究[J].无损探伤,2002,26(2):6-8. [5] 任富华. 不锈钢压气机转子叶片叶根与榫头转R处超声探伤方法研究[C]//辽宁省无损检测学会第七届学术年会论文集.大连:辽宁省无损检测学会, 2002:12-15. [6] 陈新波, 张海兵.某型飞机空速管的超声表面波检测[J].无损检测,2011,33(3):17-18,23. [7] 张传明, 董德秀,赵帅军,等.压气机叶片原位超声表面波检测[J].无损检测,2013,35(3):62-65.
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