Free vibration of large-diameter, thin-walled oil pipelines considering the influence of longitudinal force and mass of flowing liquid
https://doi.org/10.31660/2782-232X-2025-1-93-101
EDN: MQOHFB
Abstract
This study examines the free vibrations of thin-walled, large-diameter oil pipelines, considering the influence of longitudinal force and the mass of flowing liquid. It confirms that these factors critically affect the structural reliability of the pipelines and therefore must be included in calculations. The numerical analysis was based on the semi-instantaneous shell theory, accounting for internal pressure, the thickness of the protective reinforced concrete layer, the soil’s spring constant, and the applied longitudinal force. The results showed that, during oil transport, the natural vibration frequencies of the pipeline decrease more rapidly than during gas transport. Increasing the thickness of the reinforced concrete shell and the internal operating pressure increases the frequencies and the overall stiffness of the system. The soil’s spring constant also place a significant role by offsetting some of the loads and increasing the vibration frequencies. The study confirmed that the longitudinal force has the greatest influence on the dynamic characteristics of the pipeline, leading to a significant decrease in the free vibration frequencies. The findings and established relationships should be used in the design and operation of large oil pipelines in heterogeneous soils to ensure the required stability and minimize the risk of resonance.
Keywords
thin-walled shell,
semi-instantaneous theory,
calculation of the oil pipeline,
longitudinal force,
inhomogeneous shell
Supporting agencies: This work was prepared as part of a state assignment for scientific projects carried out by research teams at higher education institutions under the Ministry of Science and Higher Education of the Russian Federation; project No. FEWN-2024-0006 "Computer modeling of mechanical, thermal, and dynamic processes in weak and permafrost soils to ensure the reliability of soil foundations for engineering structures".
About the Author
S. I. Volynets
Industrial University of Tyumen
Russian Federation
Russian Federation
Svyatoslav I. Volynets, Assistant in the Department of Structural Mechanics
Tyumen
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Review
For citations:
Volynets S.I. Free vibration of large-diameter, thin-walled oil pipelines considering the influence of longitudinal force and mass of flowing liquid. Architecture, Construction, Transport. 2025;5(1):93-101. (In Russ.) https://doi.org/10.31660/2782-232X-2025-1-93-101. EDN: MQOHFB
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