Stress-strain analysis of pipelines laid in permafrost

Increasing reliability of pipelines becomes a real challenge at all stages: design, construction and operation of pipeline systems. It is very important to determine the behaviour of the constructed pipeline under the operational and environmental loads using the design model in accordance with that one adopted in the rules and regulations. This article presents the simulation of pipeline in permafrost. The evaluation of the stress-strain state is given herein and the areas of the stress concentration are detected with the account for different loads occurred during the pipeline operation. Information obtained from the assessment of the stress-strain state of the pipeline allows determining sections in pre-emergency state (even before damages) and take all the necessary measures for eliminating them, thus increasing the pipeline system reliability. It is shown that the most critical pipeline cross-section is observed at the point of transition from one environment to another. The maximum strains decrease the level of the pipeline reliability. The finite element model is presented to determine the pipeline sections in pre-emergency state

Finite Element Model of Trenchless Pipe Laying

The paper focuses on the stress and strain state of the underground main pipeline section using Autodesk Inventor software

Computer Simulation of Stress-Strain State of Oil Gathering Pipeline Designed for Ugut Field

The paper presents the stress and strain state modeling of infield pipeline in Ugut oil field. The finite element models of the stress field distribution in the pipeline wall are presented in this paper. The attention is paid to the pipeline reliability under stress conditions induced by the internal pressure and external compressive or tensile loads

Computer Simulation of Stress-Strain State of Pipeline Section Affected by Abrasion Due to Mechanical Impurities

The paper presents the effect of abrasive wear of the pipeline section occurred due to mechanical impurities in the transported gas flow. The approaches to the detection of the maximum specific wear of the pipeline wall and the geometry of abrasion are the main problems of computer simulation described in this paper

Stress and Strain State Analysis of Defective Pipeline Portion

The paper presents computer simulation results of the pipeline having defects in a welded joint. Autodesk Inventor software is used for simulation of the stress and strain state of the pipeline. Places of the possible failure and stress concentrators are predicted on the defective portion of the pipeline

Evaluation of soil-pipe interaction of underwater pipelines in soft soils

The paper presents a comprehensive approach to the uniting of models implemented in application-oriented packages. Research findings can be used to design the main pipeline. The modeling and analysis of the stress-strain state of the soil-pipe interaction system are presented herein. This paper analyzes the stress-strain state of the pipeline wall using the ANSYS software package. After the creation of the pipeline solid model, the stress analysis is carried out for all loads calculated at the design stage. The calculation results show that the stress-strain state of the pipeline depends on the depth of its location