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TECHNICAL PAPERS

Lateral Thermal Buckling of Pipelines on the Sea Bed

[+] Author and Article Information
D. J. Miles, C. R. Calladine

Department of Engineering, University of Cambridge, Cambridge CB2 1PZ, UK

J. Appl. Mech 66(4), 891-897 (Dec 01, 1999) (7 pages) doi:10.1115/1.2791794 History: Received May 18, 1999; Revised August 02, 1999; Online October 25, 2007

Abstract

Lateral buckling can occur in a submarine pipeline laid (without trenching) on the seabed, when the oil temperature rises. Motion of the (elastic) pipe relative to the sea bed is resisted by friction. The initial buckling is a localization phenomenon, and the first buckle lobes to form grow in amplitude most rapidly as the temperature increases. But as the temperature continues to rise, these early buckles cease growing, and growth is transferred to adjacent, newly formed lobes. The lobes first formed thus eventually become “extinct.” We investigate these phenomena by means of a small-scale physical model and by computer simulation. The results of many computer runs can be condensed into a few universal curves by the use of suitable dimensionless groups. Simple formulas emerge for the amplitude and wavelength of the “extinct” lobes, and for the maximum bending strain experienced by the pipeline, as a function of temperature.

Copyright © 1999 by The American Society of Mechanical Engineers
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