Attenuation and Time-Frequency Characteristics of Explosion Ground Vibration of Shallow Buried OD1422-X80mm-12 MPa Pipeline Based on Prototype Experiment
Publication: Journal of Performance of Constructed Facilities
Volume 34, Issue 1
Abstract
In this paper, the explosion experiment of OD1422-X80mm-12 MPa natural gas pipeline was carried out to study the vibration hazards. The classic Sodev’s empirical formula was improved to predict the vibration velocity of the gas pipeline explosion. At the same time, the fast Fourier-transform (FFT) was used to analyze the data. It was found that the vibration energy was mainly distributed in the range of 0–100 Hz, and there were several subfrequency centers. The Hilbert–Huang transform (HHT) method was used to decompose the vibration into time-frequency domain. It was shown that the pipeline explosion vibration presented multiple loading modes, and there were extremely low frequency (ELF) components that existed for a long time. The research results laid the foundation for further comprehensive analysis of the hazards of natural gas pipeline explosion, and provided reference for safety design of parallel pipeline and buildings.
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Acknowledgments
This research was supported by the National Natural Science Foundation of China Nos.11672331 and 51608530. The authors would like to gratefully acknowledge this support.
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Published In
Journal of Performance of Constructed Facilities
Volume 34 • Issue 1 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jul 15, 2018
Accepted: Apr 9, 2019
Published online: Nov 11, 2019
Published in print: Feb 1, 2020
Discussion open until: Apr 11, 2020
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