- 期刊
The Law of Acoustic Emission Signal when PE Pipe is Damaged by a Third Party
摘要
Aiming at the characteristics of existing urban water supply pipelines that are vulnerable to third-party damage and causing pipeline ruptures, the acoustic emission monitoring technology for pipeline impact failure was tested and studied. Set up a PE water supply pipeline impact failure system, use a water pump to pass water into the pipeline system to simulate the pipeline in-service state, use a simple beam impact test to simulate the impact test on the pipe body, and change the impact pendulum from 43°, 53°, and 63° angles Static release, collect the acoustic emission signals at 200mm, 300mm, 400mm, 500mm from the impact point, and analyze the signal characteristic parameters and spectrum law. The results show that the amplitude, energy count, and ringing count tend to decrease with the increase of the monitoring distance, and increase with the increase of the impact angle. The main frequency of the impact process is distributed in a certain range.