Abstract
The article is about the study of the frequencies of free oscillations of a large-diameter polyethylene gas pipeline with a semi-underground installation, which carried out on the basis of the solution for a semi-underground thin-walled steel pipeline of large diameter. As a result of oscillations, the cross section of the pipeline is deformed, but it strongly depends on the geometrical and mechanical parameters set, for example, on the stiffness coefficient of the elastic medium
Highlights
The need to ensure the reliability of trunk pipelines is caused by their operation in various climatic and geological conditions
We consider the underground type of laying gas pipelines of large diameter; it is necessary to investigate the effect of the soil pressure surrounding the pipeline and the effect of its frequency and the shape of free vibrations
– shell material density; R is the radius of the cross section; n and m are wave numbers in the longitudinal and circumferential direction; L is the length of the shell; p0 is the internal working pressure; h is the shell thickness; k is the stiffness coefficient of the elastic medium; h
Summary
The need to ensure the reliability of trunk pipelines is caused by their operation in various climatic and geological conditions. We consider the underground type of laying gas pipelines of large diameter; it is necessary to investigate the effect of the soil pressure surrounding the pipeline and the effect of its frequency and the shape of free vibrations.
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