Determination of Limit Load to Buried Gas Pipeline with Inner Crack under Rockfall Impact Load Based on VCCT

A numerical approach, based on obtaining design formulas for the determination of hydraulic resistance coefficients of sites in pipeline transportation systems in the presence of the results of observations over a gas pipeline operating regimes, is proposed. The representation of the hydraulic network in the form of a directed graph allows to essentially reduce the number of equations in the system down to the number of closed loops. In the software implementation of the method described, for the solution of practical problems, group identification of the hydraulic resistance coefficients is provided for every eventuality.

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Determination of Manganese in Welded Joint and Pipe Body of API X100 Grade SAWH and SAWL Pipe for Gas Pipeline Transportation Systems

Asian Journal of Chemistry ◽

10.14233/ajchem.2013.14167 ◽

2013 ◽

Vol 25 (6) ◽

pp. 3487-3490

Author(s):

Xiaodong Shao ◽

Xinli Han ◽

Guangsan Song ◽

Xiaodong He ◽

Yangqin Liu ◽

...

Keyword(s):

Welded Joint ◽

Transportation Systems ◽

Gas Pipeline ◽

Pipeline Transportation

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Can a buried gas pipeline experience local buckling during earthquake ground shaking?

Soil Dynamics and Earthquake Engineering ◽

10.1016/j.soildyn.2018.10.027 ◽

2019 ◽

Vol 116 ◽

pp. 511-529 ◽

Cited By ~ 15

Author(s):

N. Psyrras ◽

O. Kwon ◽

S. Gerasimidis ◽

A. Sextos

Keyword(s):

Local Buckling ◽

Gas Pipeline ◽

Ground Shaking ◽

Buried Gas Pipeline

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Effect of excavation blasting vibration on adjacent buried gas pipeline in a metro tunnel

Tunnelling and Underground Space Technology ◽

10.1016/j.tust.2018.08.022 ◽

2018 ◽

Vol 81 ◽

pp. 590-601 ◽

Cited By ~ 12

Author(s):

Nan Jiang ◽

Tan Gao ◽

Chuanbo Zhou ◽

Xuedong Luo

Keyword(s):

Gas Pipeline ◽

Blasting Vibration ◽

Metro Tunnel ◽

Buried Gas Pipeline

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EVALUATION OF THE STRESSED DEFORMED STATE OF MAIN GAS PIPELINES RUNNING IN PERMANENTLY FROZEN GROUNDS

Kontrol Diagnostika ◽

10.14489/td.2020.12.pp.058-063 ◽

2020 ◽

pp. 58-63

Author(s):

M. M. Sidorov ◽

N. I. Golikov ◽

R. P. Tihonov

Keyword(s):

Experimental Data ◽

Calculated Data ◽

Gas Pipeline ◽

Loss Of Stability ◽

Portable Equipment ◽

Ray Method ◽

X Ray ◽

Deformed State ◽

Pipeline Monitoring

The work evaluates the stress deformed state of the section of the interfield gas collecting main, running in permanently frozen grounds. The object of research is a section of a pipeline with an arched discharge formed as a result of loss of stability as a result of thermal erosion of permanently frozen grounds to disturbance of the vegetation cover. The determination of stresses was carried out by the X-ray method using portable equipment. The experimental data were analyzed with the calculated. The calculated data were obtained by measuring the spatial position of the gas pipeline section. The obtained values of the acting stresses and the estimates of the critical indicators of the gas pipeline monitoring section made it possible to reasonably estimate the stress state. The methodology for determining the acting stresses of pipelines using portable X-ray equipment can be successfully applied to estimate the stressed-deformed state of pipeline systems running in the zone of permafrost.

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Shock Spectra of an Armored Vehicle With Cutouts Using ADINA

13th Computers in Engineering Conference ◽

10.1115/cie1993-0041 ◽

1993 ◽

Author(s):

Aaron D. Gupta ◽

Henry L. Wisniewski

Keyword(s):

Impact Load ◽

Element Model ◽

Global Response ◽

Vehicle Performance ◽

Performance Accuracy ◽

Secondary Systems ◽

Frequency Regime ◽

Armored Vehicle ◽

Nonlinear Components

Abstract Light combat vehicles are playing an important support role for both troops and other heavily armored combat vehicles. As such, they have a much greater risk than in previous roles of being subjected to transient loads such as impact and overpressure loads. Propagation of ballistic shock from an impacted region to the critical locations and attachment points for secondary systems can cause damage and misalignment to sensitive equipments contributing to malfunction and reduction of vehicle performance. Accuracy of determination of dynamic response of these vehicles is directly dependent on the degree of refinement of the generated model and how well the model incorporates the essential features of the vehicle and correlates to its important characteristics without being over-burdened by non-essential details. Additionally, response of nonlinear components of the vehicle in high frequency regime may influence the overall global response of the vehicle. As a result, hatch openings and access door cutouts with unsymmetric locations may have to be incorporated in the finite element model to allow fair comparison with first order experiments involving a stripped vehicle hull. The current study is an attempt to assess the influence of multiple rectangular cutouts on the overall transient response of a vehicle hull subjected to a side-on impact load.

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