摘要
在液压试验装置上,对含预制裂纹的压力管开展了缺陷扩展声发射信号试验研究。全程不间断监测压力管道疲劳裂纹扩展的声发射信号,并对采集到的信号进行分析处理。结果表明:管道缺陷声发射信号的幅度和能量随加载时间逐步增大,可以用于鉴别管道是否存在活动缺陷;在缺陷贯穿前,声发射信号的幅度、能量和计数急剧增加,可以预报管道缺陷的贯穿泄漏。
Experimental investigations of acoustic emission （AE） of active defect in pressure piping with a prefabricated crack under hydraulic pressure tester were conducted. AE signals of fatigue-crack-growth in pressure piping were monitored incessantly in all processes, and all signals recorded were analyzed and processed. The result of signal processing show that the amplitude and energy of acoustic emission signals from defect in pressure pipeline increase gradually with the load time, and thus the active defects in pipeline can be identified; the amplitude, energy and count of acoustic emission signals increase sharply before the defect runs through, and we can forecast the penetrated leakage of pipeline.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2009年第4期13-16,58,共5页
Nuclear Power Engineering
关键词
压力管道
液压
活动缺陷
声发射
Pressure piping, Hydraulic pressure, Active defect, Acoustic emission
