The study of the stress-strain state (SSS) of aboveground sections of pipelines is an important condition for determining its strength. In turn, compliance with the strength conditions established for a given design scheme for laying a pipeline, reflecting the actual conditions of its operation, is one of the main requirements for ensuring reliability during the operation of main pipelines. In order to increase the safety of operation and the resource of the pipeline, it is necessary to ensure a minimum stress in the pipe walls at assumed loads. The existing regulatory and technical documentation and scientific literature source has not fully resolve the calculation of the SSS parameters of above-ground zigzag sections of pipelines. The existing methods for calculating above-ground zigzag sections of pipelines do not take into account such factors as the frictional force of the elevated pipework and the value of the radius of curvature of the bent branch at the top of the snake, which significantly affect the SSS of the pipeline during its operation.
The purpose of the research is to improve the existing methods for calculating the SSS of an above-ground zigzag-laid section of a pipeline, with allowance for unaccounted for design and operational parameters. The article discusses an improved method for calculating the parameters of the SSS of the aboveground zigzag pipeline section taking into account the frictional force of the elevated pipework and the radius of the bent branch at the apex of the angle of rotation. The reliability of the proposed calculation method is confirmed by computer simulation on START-PROF 4.85 R1 and ANSYS Mechanical R19.0 software systems. A qualitative and quantitative assessment of the influence of design and operational parameters on the SSS of the above-ground zigzag section of the pipeline is given.
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