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A parametric study on the effects of surface explosions on buried high pressure gas pipelines

In this paper, to enhance the safety of these lines, response of a buried 56-inch diameter high pressure natural gas pipeline to a surface blast was numerically investigated. Besides, the effects of: i) explosive mass, ii) pipeline thickness, iii) burial depth and iv) concrete protective layer on pipeline deformation were parametrically studied. | A parametric study on the effects of surface explosions on buried high pressure gas pipelines Engineering Solid Mechanics 2017 225-244 Contents lists available at GrowingScience Engineering Solid Mechanics homepage www.GrowingScience.com esm A parametric study on the effects of surface explosions on buried high pressure gas pipelines Omid Adibi Amin Azadi Bijan Farhanieh Hossein Afshin Center of Excellence in Energy Conversion School of Mechanical Engineering Sharif University of Technology Iran A R T I C L EI N F O ABSTRACT Article history Underground gas pipelines are one of the vital parts of each country which surface blasts can Received 6 June 2017 break down such pipelines making destructive explosions and threatening the safety of Accepted 11 September 2017 neighborhood structures and people. In this paper to enhance the safety of these lines response Available online of a buried 56-inch diameter high pressure natural gas pipeline to a surface blast was 11 September 2017 Keywords numerically investigated. Besides the effects of i explosive mass ii pipeline thickness iii Surface Blasts burial depth and iv concrete protective layer on pipeline deformation were parametrically Natural Gas Pipelines studied. To simulate the problem according to actual explosion events geometries were Numerical Methods modeled in real scales pipeline properties were predicted with Johnson-Cook strength and Fluid Solid Interaction failure model and soil strength was determined by Drucker-Prager model. Also explosive Safety charge and natural gas were modeled with JWL Jones-Wilkins-Lee and ideal gas equation of states. For validation of the numerical method three bench mark experiments were reproduced. Comparison of the numerical results and the experimental data confirmed the accuracy of the numerical method. Results of parametric studies indicated that by increasing the burial depth from 1.4 to 2.2 m deformation of the pipeline was reduced about 71 . By analyzing the deformation