Transverse Vibrations of Underground Pipelines with Different Interaction Laws of Pipe with Surrounding Soils

Batir Mardonov,Ekaterina An,Gulchexra Ismoilova,Shuhrat Shojalilov,Yakutxon Khakimova,D Bazarov

doi:10.1051/e3sconf/202126402035

Abstract

Studies on the effect of changing the stiffness coefficient along the length of the pipeline on its resonant vibration mode are considered in the paper. A computational model of transverse vibrations of the pipeline located in soil with different properties is created. Theoretical and computational studies to solve the problems of stability of underground pipelines located in the soils with different properties under seismic effects are carried out. It is revealed that the vibratory process of the pipeline can be realized at frequencies close to resonance. The results of the study are presented as curves of distribution of displacements of pipeline sections along the length at dimensionless frequencies. When the pipeline vibrates with a frequency close to the resonant frequency, the displacements of pipeline sections can take very large values. It is shown that at frequencies close to resonance, the values of moments can be large in the pipeline sections, which are the reasons for the loss of pipeline stability.

Highlights

IntroductionUnderground pipelines are buried in the ground, and they stretch over large areas, where they interact with soils of different physical and mechanical properties
At present time pipelines are used to deliver water, oil, gas and etc
Underground pipelines are buried in the ground, and they stretch over large areas, where they interact with soils of different physical and mechanical properties

Summary

Introduction

Underground pipelines are buried in the ground, and they stretch over large areas, where they interact with soils of different physical and mechanical properties. It significantly increases their exposure to damage from all sorts of sources, in particular during seismic activity. In all the above investigations, when considering the interaction of the underground pipeline with the surrounding soil, the variability of the interaction parameters along the length of the pipeline is not considered This is especially important for long pipelines buried in the ground and stretched over large areas, where soil conditions change significantly. The behavior of the pipeline mainly depends on the choice of the law of its interaction with the surrounding soil, which in the simplest cases is characterized by the interaction coefficients determined from experiments [5, 7, 11, 12]

Methods

Results

Conclusion