Pipe-soil vibration characteristics of natural gas pipelines during the pigging process

Zhang, Huaixin; Qin, Min; Liao, Kexi; Wang, Ke; He, Guoxi

doi:10.1016/j.jngse.2021.104148

Cited by 9 publications

(3 citation statements)

References 30 publications

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“…The two adopt the form of surface contact. The contact surface algorithm adopts the enhanced Lagrangian algorithm and the Coulomb friction model, and the friction coefficient is 0.4 [14][15][16]. The interaction mode of the contact surface is standard contact.…”

Section: Numerical Analysis Modelmentioning

confidence: 99%

Buried Pipeline Collapse Dynamic Evolution Processes and Their Settlement Prediction Based on PSO-LSTM

Zhou,

Teng,

Chi

et al. 2023

Applied Sciences

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Based on the unit life and death technology, the dynamic evolution process of soil loss is considered, and a pipe-soil nonlinear coupling model of buried pipelines passing through the collapse area is constructed. The analysis shows that after the third layer of soil is lost, the existence of the “pipe-soil separation” phenomenon can be confirmed, which then supplements the assumption that “pipe-soil is always in contact” in the elastic foundation beam theory. Calculation of settlement deformation of buried pipelines It needs to be divided into two stages: cooperative deformation and non-cooperative deformation. Taking the settlement prediction of buried pipelines as the goal, the particle swarm algorithm (PSO) was used to optimize the number of neurons, Dropout, and Batch-size in the long short-term memory network (LSTM) structure. The optimization results were 60, 0.001, and 100, respectively. The PSO-LSTM model proposed in this article can accurately describe the dynamic evolution process of buried pipelines and has better prediction accuracy than the modified Gaussian curve method and LSTM neural network model. The use of this model can provide a reference for safety risk management, disaster early warning, and intelligent monitoring when buried pipelines suffer from soil collapse disasters.

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Section: Numerical Analysis Modelmentioning

confidence: 99%

Buried Pipeline Collapse Dynamic Evolution Processes and Their Settlement Prediction Based on PSO-LSTM

Zhou,

Teng,

Chi

et al. 2023

Applied Sciences

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“…The MFL inner detector, used in an MFL inspection, is also called the pipeline inspection gauge (PIG). The operation of the PIG is driven by the pressure difference between the head and tail of the PIG [12], which is created by interference between the polyurethane cup and the pipe wall, forming a seal [13][14][15]. However, due to the small radius of curvature in the bends of small-diameter pipelines and the complex working conditions, the PIG may have poor passing capacity for moving through these pipelines.…”

Section: Introductionmentioning

confidence: 99%

Analysis via 3D FEM of the Passing Capacity of Pipeline Inspection Gauges in Bends with Different Curvatures

Zhou,

Lin,

Zhang

et al. 2023

Processes

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Pipeline inspection gauges easily become wedged in offshore and onshore small-diameter pipelines (where the outer diameter, D, of the pipe is less than 150 mm), particularly at the bends. To reveal the relationship between PIG capacity and bend curvature radius, a quantitative study on the passing capacity of PIG was conducted in this paper from three key perspectives of performance: safe application, sealing, and driving. The results demonstrate that the pipeline inspection gauge exhibits better passing capacity as the curvature radius of the bend increases. To improve the poorest passing capacity, in the case of R = 3D, different numbers of grooves are opened in the cup. The results demonstrate that the cup with 24 square grooves has a substantial impact on optimizing the passing capacity of the pipeline inspection gauge. This enhancement results in improvements in safe application performance (40.8%), sealing performance (12.22%), and driving performance (17%). This research aims to expand our understanding of blockages in small-diameter pipelines and provide a basis for optimizing the structure of the pipeline inspection gauge for small-diameter pipelines.

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“…When creating pipeline fittings, numerical and mathematical modeling methods are indispensable [24][25][26]. They make it possible to obtain information about the behavior of the valve and its individual parts and to determine the optimal parameters to satisfy the conditions of strength and tightness at the early stages of design [27,28]. Mathematical modeling enables us to obtain information about the system behavior under various types of loading when working with fluids in different states [29,30].…”

Section: Introductionmentioning

confidence: 99%

Operation Simulation for a Check Valve Used in High-Performance Systems

Soboleva,

Kerimov,

Anudinov

et al. 2023

Civ Eng J

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This research aims to increase the reliability and safety of pipeline systems by creating an improved model range of Butterfly Check Valves (BCV). Pipes through which working fluids are transported, parts related to shut-off and control valves, control measuring instruments, fasteners, anticorrosion elements, and other structural components are the main elements that make up pipelines. Fittings can be of different types; BCV refers to protective ones. These devices protect pipelines by disconnecting the working line in the event of a sudden change in the transported fluid parameters (pressure, flow direction), resulting in the failure of the entire system. Based on an analysis of the key requirements for valves, namely reliability, tightness of a closed system, ensuring safe operation, and analysis of existing BCVs, the design of the presented valve was created. Improved overall dimensions and tightness, both in the open and closed states, as opposed to the existing analogs, are distinctive features of the developed design of butterfly check valves. To confirm the results, the authors, using the finite element method, calculated the stress–strain state of the structure under normal conditions and with regard to the maximum temperatures of the working fluid. The reliability indicators of the developed elements were also calculated to confirm their operability. As a result, it was concluded that after the developed valves have passed acceptance tests, the research findings will make it possible to increase the reliability and safety of the valve itself and the entire pipeline system by introducing these structures into enterprises. Doi: 10.28991/CEJ-2023-09-12-017 Full Text: PDF

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Pipe-soil vibration characteristics of natural gas pipelines during the pigging process

Cited by 9 publications

References 30 publications

Buried Pipeline Collapse Dynamic Evolution Processes and Their Settlement Prediction Based on PSO-LSTM

Buried Pipeline Collapse Dynamic Evolution Processes and Their Settlement Prediction Based on PSO-LSTM

Analysis via 3D FEM of the Passing Capacity of Pipeline Inspection Gauges in Bends with Different Curvatures

Operation Simulation for a Check Valve Used in High-Performance Systems

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