Test Research on Spectral Characteristics of Acoustic Emission from Pressure Pipe Defect

LIU Zhi-zhong; WANG Yao; AI Qiong; HE Pan; SONG Jian

Oct. 2010

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LIU Zhi-zhong, WANG Yao, AI Qiong, HE Pan, SONG Jian. Test Research on Spectral Characteristics of Acoustic Emission from Pressure Pipe Defect[J]. Nuclear Power Engineering, 2010, 31(5): 5-8.

Citation:

LIU Zhi-zhong, WANG Yao, AI Qiong, HE Pan, SONG Jian. Test Research on Spectral Characteristics of Acoustic Emission from Pressure Pipe Defect[J]. Nuclear Power Engineering, 2010, 31(5): 5-8.

LIU Zhi-zhong, WANG Yao, AI Qiong, HE Pan, SONG Jian. Test Research on Spectral Characteristics of Acoustic Emission from Pressure Pipe Defect[J]. Nuclear Power Engineering, 2010, 31(5): 5-8.

Citation:

LIU Zhi-zhong, WANG Yao, AI Qiong, HE Pan, SONG Jian. Test Research on Spectral Characteristics of Acoustic Emission from Pressure Pipe Defect[J]. Nuclear Power Engineering, 2010, 31(5): 5-8.

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Test Research on Spectral Characteristics of Acoustic Emission from Pressure Pipe Defect

1. Bohai Shipbuilding Heavy Industry Co., Ltd, Huludao, Liaoning, 125004, China;
2. Nuclear Power Institute of China, Chengdu, 610041, China

Received Date: 2009-06-23
Rev Recd Date: 2010-05-05

Available Online: 2025-07-31

Abstract

Abstract

A coustic emission signals were monitored incessantly in the hydraulic pressure fatigue test on pressure piping with a prefabricated crack,and this paper focused on the characteristics analysis of acoustic emission signals in the time domain and its corresponding frequency spectrum.It is found that the acoustic emission signals caused by crack extending are mostly in the low frequency,and comparatively other AE signals caused by mechanical noise and friction are in the high frequency.The signals can be distinguished by frequency.
- Acoustic emission,
- Crack extending,
- Defect,
- Frequency spectrum