Authors: P.V. Burkov, V.P. Burkov, D.L. Vakhitov, Timofeev

Title of the article: The study of stress-strain state of the pipeline with the annular defect by finite element method using ANSYS software

Year: 2019, Issue: 5, Pages: 5-13

Branch of knowledge: 05.02.08 Engineering Technology

Index UDK: 622.691.4:053:533.6(252.6)

DOI: 10.26730/1999-4125-2019-5-5-13

Abstract: When two sections of the pipeline intended for transportation of hydrocarbons are jointed, or when this joint is exposed to external factors, there is a possibility of a mechanical defect in the annular welding joints. A mechanical defect of this type reduces the load capacity of the pipeline as a mechanical structure providing interaction with the soil, which can lead to unpredictable and catastrophic consequences. This article describes a numerical experiment that simulates the operation of a pipeline section with a ring defect under the influence of soil load and internal pressure. The numerical experiment determines the value of equivalent stresses and strains in the thick-walled pipeline section of a typical design solution. The comparison of the results obtained by numerical modeling with a typical design calculation in accordance with the standards is also given. During the numerical experiment, the loads and boundary conditions correspond to the actual operating conditions of the gas pipeline. It was also found that an important parameter in the simulation is the size of the finite element grid. The simulation results give reason to assume that with obtained values of the equivalent stress and strain section of the pipeline will not be subjected to destruction under the action of given loads.

Key words: pipeline finite element method ANSYS numerical simulation stress-strain state equivalent stress equivalent strain

Receiving date: 17.10.2019

Publication date: 31.12.2019

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