Abstract
In the article, solutions are obtained for a thin-walled bimetallic pipeline. Solutions are obtained, and the frequencies of free oscillations are investigated taking into account the internal working pressure, the longitudinal compressive force, and the elastic foundation. The solutions were obtained on the basis of a geometrically nonlinear version of the semi-momentum theory of cylindrical shells of the middle bend. The proposed calculations can find application in the nuclear power industry, aviation, and the petrochemical industry.
Highlights
Two-layer steels belonging to the category of bimetals, having a base layer of structural steel and plating of corrosion-resistant, are a unique material combining the required mechanical properties and the necessary corrosion resistance
Based on the geometrically nonlinear variant of semi-momental theory of cylindrical shells solved the problem of determining the frequency of free vibrations of a thin-walled bimetallic pipeline of large diameter, which interacts with the elastic foundation
The solution take into account the impact of the internal operating pressure, the geometric characteristics of the parameter of the longitudinal compressive force, and the influence of elastic resistance on the ground
Summary
Two-layer steels belonging to the category of bimetals, having a base layer of structural steel and plating of corrosion-resistant, are a unique material combining the required mechanical properties and the necessary corrosion resistance. The increasing demand for high-performance equipment for oil and gas processing and chemical industries operating in the most extreme conditions (high and low temperatures, pressure, corrosive environments, cyclic loading), necessitates the use of reliable bimetals ensuring compliance with Rostekhnadzor's requirements for fire and explosion hazard facilities and safe operation of equipment for many years. Bimetallic pipelines have several advantages over single-layered steel, especially in terms of corrosion resistance. Such pipelines can work, as well as single-layer steel, under hazardous dynamic conditions, and this issue is interesting and relevant for the study
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