A framework for the resilience analysis of complex natural gas pipeline networks from a cyber-physical system perspective

2021 ◽  
pp. 107727
Author(s):  
Antonio Marino ◽  
Enrico Zio
Keyword(s):  
Natural Gas ◽  
Physical System ◽  
Gas Pipeline ◽  
Cyber Physical System ◽  
System Perspective ◽  
Natural Gas Pipeline ◽  
Pipeline Networks

scholarly journals GPU-accelerated hydraulic simulations of large-scale natural gas pipeline networks based on a two-level parallel process

2020 ◽  
Vol 75 ◽  
pp. 86
Author(s):  
Yue Xiang ◽  
Peng Wang ◽  
Bo Yu ◽  
Dongliang Sun
Keyword(s):  
Natural Gas ◽  
Large Scale ◽  
Parallel Simulation ◽  
Simulation Software ◽  
Gas Pipeline ◽  
Processing Unit ◽  
Pipeline Network ◽  
Natural Gas Pipeline ◽  
Pipeline Networks ◽  
Speedup Ratio

The numerical simulation efficiency of large-scale natural gas pipeline network is usually unsatisfactory. In this paper, Graphics Processing Unit (GPU)-accelerated hydraulic simulations for large-scale natural gas pipeline networks are presented. First, based on the Decoupled Implicit Method for Efficient Network Simulation (DIMENS) method, presented in our previous study, a novel two-level parallel simulation process and the corresponding parallel numerical method for hydraulic simulations of natural gas pipeline networks are proposed. Then, the implementation of the two-level parallel simulation in GPU is introduced in detail. Finally, some numerical experiments are provided to test the performance of the proposed method. The results show that the proposed method has notable speedup. For five large-scale pipe networks, compared with the well-known commercial simulation software SPS, the speedup ratio of the proposed method is up to 57.57 with comparable calculation accuracy. It is more inspiring that the proposed method has strong adaptability to the large pipeline networks, the larger the pipeline network is, the larger speedup ratio of the proposed method is. The speedup ratio of the GPU method approximately linearly depends on the total discrete points of the network.

scholarly journals Assessment of Black Powder Concentrations in Natural Gas Pipeline Networks

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 71395-71404
Author(s):  
Mahdi Debouza ◽  
Ahmed Al-Durra ◽  
Khaled Al-Wahedi ◽  
Mohamed Abou-Khousa
Keyword(s):  
Natural Gas ◽  
Gas Pipeline ◽  
Black Powder ◽  
Natural Gas Pipeline ◽  
Pipeline Networks

An Overview of the Seismic Verification Analyses Performed for Natural Gas Pipeline Networks

2004 ◽  
Author(s):  
Ch. Botsis ◽  
A. Sariyiannis ◽  
G. Anagnostides ◽  
N. Kokavesis
Keyword(s):  
Natural Gas ◽  
Seismic Response ◽  
Active Fault ◽  
Active Faults ◽  
Lateral Spreading ◽  
Gas Pipeline ◽  
Pipeline Network ◽  
Natural Gas Pipeline ◽  
Pipeline Networks ◽  
Ground Displacements

The purpose of this paper is to present an overview of the various seismic analyses performed and the measures taken to ensure the mechanical integrity of the natural gas pipeline networks in Greece. Design of large pipeline networks in an open countryside is a complicated issue and involves many disciplines and works, such as, preliminary geological investigation, topographical investigation, detailed geotechnical investigation, adjustment of pipeline routing (if necessary) according to the detailed investigation results and finally pipeline stress verification due to stresses induced by seismic loading caused either by soil lateral spreading during a seismic event or by the rupture of active faults. Engineering judgment and previous experience are important to determine the best pipeline routing, however, due to the large seismic events occurring in Greece, measures are always necessary to improve the seismic response of pipeline networks. Loading of buried pipelines, due to earthquake induced permanent ground displacements (active fault rupture and lateral spreading) is displacement controlled. Various analyses were performed to evaluate the maximum ground surface acceleration and its reduction with depth, which control the outcome of the liquefaction potential. The results of the liquefaction analyses were used to compute permanent ground displacements. These displacements as well as the active fault displacements were applied to critical parts of the pipeline network and elasto-plastic analyses were performed to compute the resulting pipeline stresses and strains. Various mitigation measures have been taken to release pipeline stresses, such as changing (where possible) the pipeline routing, widening the pipeline trench in critical areas, using a light-weight backfill material, increasing the pipeline thickness, etc. The paper will present an overview of the various analyses performed and will summarize the measures taken to improve the seismic response of the pipeline network.

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