DYNAMIC STABILITY OF A STRAIGHT PIPE CONVEYING FLUID, ELASTICALLY RESTRAINED AGAINST ROTATION AT ITS BOTH ENDS

Dimitar LOLOV, Svetlana LILKOVA-MARKOVA

Abstract


The article presents a dynamic analysis of a straight pipe, elastically clamped at both ends. The stiffnesses of the two angular springs are equal. The flowing fluid is incompressible and heavy, moving through the pipe at a constant speed. For three different values of the stiffness of the elastic clamping of the pipe, the relationships between the fluid velocity and the natural circular frequencies of the pipe are determined. In the calculations, the influence of the Coriolis force has been neglected. Considering the fact that pipeline failures and associated fluid leaks lead to environmental, financial, and health issues, the main objective of the article is to determine the critical fluid velocity for each of the studied pipes, at which they lose stability. The study provides insights into how the rigidity of both elastic springs affects the system's stability.


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References


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