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| Time frequency analysis of vibration signals generated by high pressure gas pipeline bursting based on the Hilbert-Huang transform |
| WU Jianyuan1,2，LONG Yuan2，JI Chong2，LI Xinghua2，MA Huayuan2，CHENG Liangyu2 |
1. 75833 Units, Guangzhou 510080, China；
2. College of Field Engineering, PLA University of Science & technology, Nanjing 210007, China |
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Abstract In order to study the shock and vibration harmful effect generated by high pressure gas pipeline bursting, full-scale bursting experiments of X90 pipes were conducted in this study. In the experiments, the crack velocity, pressure variation inside the pipe and vibration velocity on the ground were measured. The experimental results were analyzed to reveal the formation mechanism and propagation law of the seismic waves generated by pipes bursting. In the data processing process, the Hilbert-Huang Transform (HHT) was used to analyze the vibration signals, and the time-frequencyenergy distribution of the signals has been shown by HHT precisely and clearly. Additionally, this paper has verified that HHT has superior performance in revealing hidden physical meanings in data and is suited for analyzing non-stationary dynamic vibration signals.
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Received: 27 September 2016
Published: 15 April 2018
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