Stability and Stress State of an Underground Pipeline Joined to a Unit.

Autor:	Rashidov, T. R., Mardonov, B. M., An, E. V.
Předmět:	UNDERGROUND pipelines RANGE of motion of joints STRESS concentration PIPELINES
Zdroj:	International Applied Mechanics; Jul2021, Vol. 57 Issue 4, p490-496, 7p
Abstrakt:	The stability of a pipeline jointed to a unit interacting with the surrounding soil is analyzed. The pipeline is subject to axial compression. The stress state of the pipeline body (elastic beam) is directly related to the uplifting of the unit. The axial force at which the stress reaches the critical value is calculated. The influence of the stiffness coefficient (soil conditions) and the location of the unit on the stability of the pipeline are shown. Calculated results for the unit fixed at the middle of the beam (pipeline) and for its asymmetric location are given. The results are presented in the form of curves of the reduced dimensionless frequency and distribution of the longitudinal stress along the beam axis and commented. It is revealed that the asymmetric location of the unit leads to a decrease in the critical force at which stability loss occurs. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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