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RESEARCH PAPERS

Inclusion of a Support Friction Into a Computerized Solution of a Self-Compensating Pipeline

[+] Author and Article Information
J. Sobieszczanski

Parks College, St. Louis University, St. Louis, Mo.

J. Eng. Ind 94(3), 797-802 (Aug 01, 1972) (6 pages) doi:10.1115/1.3428253 History: Received May 19, 1971; Online July 15, 2010

Abstract

Thermal elongations of a pipeline are compensated in many cases by bending of pipeline branches. If the pipeline lies on a horizontal rough and flat foundation that bending is influenced by friction forces. Analysis of that influence is given in the paper. A nonlinear, fourth order differential equation with variable coefficients governing the phenomenon is derived and solved numerically as a two-point boundary problem. A version of the solution suitable for a pipeline on discrete supports has been developed. It may be used in conjunction with any existing computer program for pipeline stress analysis. The results demonstrate existence of a very significant additional bending moment due to friction. It may exceed several times the one computed for a pipeline on frictionless foundation.

Copyright © 1972 by ASME
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