摘要
采用声发射技术在锅炉水压试验过程中对联箱管座焊缝损伤的变化进行动态监测,在复杂的干扰噪声中找到损伤活动信号,通过分析损伤产生声发射的机理,得到表征焊缝裂纹活动过程的信号特征。采用声发射实时监测方法与超声波离线检测方法的结合,对联箱管座内部损伤所在位置以及损伤在水压试验过程中动态发展的情况进行综合判断分析,两种方法的组合以及相互验证提高了结果判断的可靠性,对现场检测起到重要的指导作用。
The acoustic emission technique was employed for the monitoring of couplet box tube socket weld injury changes in the boiler hydrostatic test process. By finding damage activity signals in the complex interference noise background and by the analysis of the mechanism of injury-induced acoustic emission characterization, the signals characteristic of weld cracks were obtained. The combination of real time monitoring methods using acoustic emission and offline ultrasonic detection methods has resulted in a comprehensive evaluation of couplet box header internal damage location and damage development during hydrostatic testing process. The combination of the two methods, as well as the mutual authentication can improve the reliability, which plays an important role in guiding the on-site testing.
出处
《无损检测》
2013年第7期56-59,共4页
Nondestructive Testing
关键词
声发射
联箱管座
焊缝损伤
实时监测
Acoustic emission
Header tube seat
Crack damage~ Real-time monitoring
