Experimental and Numerical Simulation Study on the Shock and Vibration Effect of OD1422-X80 Mainline Natural Gas Pipeline Explosion

In this paper, the explosion experiment of the OD1422-X80 natural gas pipeline was carried out. The phenomenon of pipeline explosion was recorded, and a large amount of data on vibration effects were obtained. The data showed that the ground vibration during the explosion was mainly caused by the physical explosion process, and the subsequent gas explosion did not produce strong vibration. Based on the ANSYS/LS-DYNA platform, a numerical calculation model of this experiment was established. The numerical results agreed well with the experimental results. Simulation and experimental results showed that when the gas pressure in the pipe was lower than 7 MPa, the pipeline cracks stop growing. The maximum speed of the pipe wall moving outward reached 50 m/s, which formed a huge impact compression effect on the surrounding soil. This state spread to distant places and gradually decayed into an elastic stress wave, which formed a ground vibration effect. Time-frequency analysis was introduced into the vibration signal processing. The analysis results showed that the main frequency of pipeline explosion vibration was distributed around 10 Hz and had a long duration. The research results provided a reference for subsequent gas pipeline explosion test and numerical simulation research.

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Natural-gas pipeline leak location using variational mode decomposition analysis and cross-time–frequency spectrum

Measurement ◽

10.1016/j.measurement.2018.04.030 ◽

2018 ◽

Vol 124 ◽

pp. 163-172 ◽

Cited By ~ 24

Author(s):

Qiyang Xiao ◽

Jian Li ◽

Jiedi Sun ◽

Hao Feng ◽

Shijiu Jin

Keyword(s):

Natural Gas ◽

Frequency Spectrum ◽

Decomposition Analysis ◽

Gas Pipeline ◽

Variational Mode Decomposition ◽

Time Frequency ◽

Natural Gas Pipeline ◽

Leak Location ◽

Mode Decomposition

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Numerical simulation of black powder removal process in natural gas pipeline based on jetting pig

Journal of Natural Gas Science and Engineering ◽

10.1016/j.jngse.2018.07.022 ◽

2018 ◽

Vol 58 ◽

pp. 15-25 ◽

Cited By ~ 3

Author(s):

Hang Zhang ◽

Qianyue Zheng ◽

Dongliang Yu ◽

Na Lu ◽

Shimin Zhang

Keyword(s):

Numerical Simulation ◽

Natural Gas ◽

Gas Pipeline ◽

Black Powder ◽

Removal Process ◽

Natural Gas Pipeline

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An explicit staggered-grid method for numerical simulation of large-scale natural gas pipeline networks

Applied Mathematical Modelling ◽

10.1016/j.apm.2018.07.051 ◽

2019 ◽

Vol 65 ◽

pp. 34-51 ◽

Cited By ~ 10

Author(s):

Vitaliy Gyrya ◽

Anatoly Zlotnik

Keyword(s):

Numerical Simulation ◽

Natural Gas ◽

Large Scale ◽

Grid Method ◽

Gas Pipeline ◽

Staggered Grid ◽

Natural Gas Pipeline ◽

Pipeline Networks

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Numerical Simulation on Flow Field inside the Drainage Valve of the Natural Gas Pipeline

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.853.377 ◽

2013 ◽

Vol 853 ◽

pp. 377-383

Author(s):

Zhian Deng ◽

Hao Yun Deng ◽

Mei Xie

Keyword(s):

Numerical Simulation ◽

Natural Gas ◽

Flow Field ◽

Velocity Vector ◽

Gas Pipeline ◽

Natural Gas Pipeline ◽

The Standard Model ◽

Vector Distribution ◽

Flow Field Characteristics ◽

Valve Opening

In order to ensure safety and reliable operation of the natural gas pipeline drainage valve,the 3D numerical simulation on flow field characteristics inside the drainage valve of the natural gas pipeline under the different conditions of the seasons of winter and summer is carried out by using the standard model. In the tow different season condition, the streamline and velocity vector distribution inside the drainage valve has been studied. Under the two seasons conditions are studied. The results show that as the change of drainage valve opening the turbulence appear in the valve and the maximum value appears in the inlet,which the winter is larger than summer.The velocity vector distribution in the drainage valve is not the same and the larger velocity appears at the drain exit with the valve opening increasing. The differences in temperature, condensate discharge, condensate gas pipeline in different displacement,density and viscosity in the winter seasons and summer seasons results in the different characteristic.of the flow field characteristics inside discharging valve.

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Study on Vibration Characteristics of Natural Gas Pipeline Explosion Based on Improved MP-WVD Algorithm

Shock and Vibration ◽

10.1155/2018/8969675 ◽

2018 ◽

Vol 2018 ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Huayuan Ma ◽

Yuan Long ◽

Xinghua Li ◽

Mingshou Zhong ◽

Jianyuan Wu ◽

...

Keyword(s):

Natural Gas ◽

Frequency Distribution ◽

Gas Pipeline ◽

Frequency Resolution ◽

Time Frequency ◽

Natural Gas Pipeline ◽

Precise Analysis ◽

Nature Gas ◽

Control State ◽

Time Frequency Distribution

In order to meet the requirement of precise analysis of nature gas pipeline explosion, authors combined MP algorithm and WVD distribution to improve the time-frequency resolution and to solve the problem of cross-terms interference. The HHT algorithm was applied to the data preprocessing of MP algorithm to reduce the computational complexity of the MP algorithm. It improved the computing efficiency and laid the foundation for big data analysis. In this paper, authors carried out a full-size pipeline explosion experiment at the CNPC pipeline fracture control State Key Laboratory. Advantages of the improved MP-WVD algorithm were taken to obtain the time-frequency distribution characteristics of the pipeline explosion vibration. The research provided a new algorithm for the time-frequency distribution of nonstationary random vibration, and the result provided a reference for the safe operation and construction of natural gas pipeline.

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