Buckling Response Analysis of Buried Steel Pipe under Multiple Explosive Loadings

Zhang, Jie; Zhang, Hao; Zhang, Lan; Zheng, Liancun

doi:10.1061/(asce)ps.1949-1204.0000431

Cited by 27 publications

(8 citation statements)

References 12 publications

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“…e expansion rate of the hanger body, the expansion force pushing the expandable cone to move downward, and the hang force are main mechanical parameters in the study of the expandable liner hanger [38][39][40][41][42][43][44][45][46][47][48][49][50][51]. e visualization module in FE software is used to obtain parameters such as the contact stress between the rubber cylinder and the outer casing, the counter force of the expandable cone, and the radial expansion displacement of the expandable tube and indirectly calculate the minimum hydraulic thrust, the hang force, etc.…”

Section: Finite Element Calculation Resultsmentioning

confidence: 99%

Investigation of Mechanical Numerical Simulation and Expansion Experiment of Expandable Liner Hanger in Oil and Gas Completion

Chen

Xiao

Zhong

et al. 2020

Shock and Vibration

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The expansion experiment of the expansion liner hanger is a one-time failure process, so in order to save cost, the finite element technology needs to be used to simulate the expansion experiment. Obtaining the mechanical parameters of the expansion liner hanger can effectively optimize the size of the expansion liner hanger structure and guide the expansion completion. Firstly, main structure and principle of expandable liner hanger were introduced. Secondly, mechanical equilibrium equations of the expandable process were established to obtain pressure of the expandable fluid, and pressure of the expandable fluid is obtained. Thirdly, finite element (FE) simulation mechanical model of the expansion of the Ø244.5 mm × Ø177.8 mm expandable liner hanger was established to analyze the hang mechanism and the change rule of mechanical parameters during the expansion. The FE results have shown that radial displacement and residual stress of the inner wall of hanger varied in 5 cycles, and the expansion ratio of the expandable tube was 7.4% during the expansion. The expansion force did not change stably but gradually increased in stages. And the hydraulic pressure required for the expandable cone to continuously move down was 18 MPa. According to the contact stress generated on five rubber cylinders and the contact stress generated on five metal collars, the total hang force has been calculated, which exceeds 1000 kN and meets the design requirements. Lastly, the expansion test results have shown that expansion pressure was 19 MPa, and the expansion rate was 7.1%. The mechanical analysis results of the expandable liner hanger were in good agreement with the experiment results in this study, which provide important mechanical parameters for well completion with expandable liner hanger.

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Section: Finite Element Calculation Resultsmentioning

confidence: 99%

Investigation of Mechanical Numerical Simulation and Expansion Experiment of Expandable Liner Hanger in Oil and Gas Completion

Chen

Xiao

Zhong

et al. 2020

Shock and Vibration

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“…Generally, the grid number and time step have great influences on the accuracy of simulation, and the calculation error gets smaller with the increase of the grid number or the decrease of time step, but too many grid numbers or too small time step may lead to low efficiency of calculation. To solve the problem, grid independence analysis and time independence verification were usually conducted to verify the accuracy of simulation and got an appropriate grid number and time step [39][40][41][42][43]. As shown in Figure 5 and Table 6, In this study, the grid numbers of 806772, 1207560, 1409480, and 1893344 were conducted in grid independence analysis, and the time step of 8e − 5 s, e − 4 s, 5e − 4 s, and 1e − 3 s were calculated in time independence verification.…”

Section: Grid Independence Analysis and Time Independencementioning

confidence: 99%

Numerical Simulation of Pipeline‐Pavement Damage Caused by Explosion of Leakage Gas in Buried PE Pipelines

Zhou

Zhenzhen

et al. 2020

Advances in Civil Engineering

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In order to investigate the damage influence of the leakage explosion in urban gas pipeline on the surrounding environment, the numerical models of buried PE (polyethylene) pipes under urban pavement were established by using ANSYS/LS-DYNA in this study. The reliability of the numerical models was verified on the basis of the explosion experiments. According to the amount of gas leakage, the TNT explosive equivalent was determined. The gas leakage explosion process of buried PE pipes was studied, and the pressure and stress changes of pipes and pavements under different explosive equivalents and buried depths were analyzed; at last, the deformation law of pipes and pavements were discussed. The results show that the PE pipes are fractured during the leakage explosion and a spherical explosion cavity is formed in the soil. The pavement above the explosion point bulges upward and forms a circle. The maximum pressure of pipe near the explosion point increases linearly with the increase of explosive equivalent, and a proportional relation is observed between the fracture width of pipe and the explosive equivalent. The degree and duration of pavement deformation increase significantly with the increase of explosive equivalents. The dynamic response of the pipes is rarely affected by the buried depth, and the change of maximum effective stress is no more than 7%. However, the buried depth is of great influence on the damage degree of pavement. When the buried depth increases from 0.9 m to 1.5 m, the pavement deformation can be reduced effectively. The variation rule of pavement deformation is similar to the change rule of maximum overpressure and effective plastic stress; they change in the form of concave functions with the increase of buried depth. The results can provide theoretical basis for municipal pipeline construction design and urban safety planning and provide references for the risk assessment of gas explosion in buried pipelines.

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“…Fu et al [3] studied the scaling of the dynamic response of strainrate sensitive armor steel subjected to air blast load. Zhang et al [4] created pipe-soil interaction models in soil and rock layers under two-point explosive loads to investigate the mechanical response of a buried steel pipe under multiple explosions.…”

Section: Introductionmentioning

confidence: 99%

Analysis on the Dynamic Responses of Steel Beam under the Condition of Heat and Blast Loads

Tan¹,

Li²,

Wu³

et al. 2022

IJHT

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Numerical simulation and analysis on the responses of steel beam under fire thermal load and blast load are performed using ABAQUS general finite element program. In this study, two cases with different order of applying the fire thermal load and blast load in a different order are considered: 1) when the steel beam is heated by fire first and then is impacted by blast load, the influence of the temperature on the pulse amplitude–impulse (P-I) diagrams is discussed and the saturated impulse and the minimum impulse related to temperature are analyzed. 2) when steel beam is impacted by blast loading first and then is attacked by fire, the influences of the initial static load and the pulse amplitude on the critical temperature-impulse (Tcr-I) diagrams are analyzed. The analysis results show that the higher the temperature is, the lower the impact resistance capability of steel beam is. The saturated impulse and the minimum impulse can be used to measure the impact resistance capability of steel beam. The impulse I(ηD) can be used to measure the fire resistance performance of steel beam. The blast load can obviously reduce the fire resistance capability of steel beam.

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Buckling Response Analysis of Buried Steel Pipe under Multiple Explosive Loadings

Cited by 27 publications

References 12 publications

Investigation of Mechanical Numerical Simulation and Expansion Experiment of Expandable Liner Hanger in Oil and Gas Completion

Investigation of Mechanical Numerical Simulation and Expansion Experiment of Expandable Liner Hanger in Oil and Gas Completion

Numerical Simulation of Pipeline‐Pavement Damage Caused by Explosion of Leakage Gas in Buried PE Pipelines

Analysis on the Dynamic Responses of Steel Beam under the Condition of Heat and Blast Loads

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