Impact—Response Behavior of Offshore Pipelines

[+] Author and Article Information
P. G. Bergan, E. Mollestad

The Norwegian Institute of Technology, 7034 Trondheim—NTH, Norway

J. Energy Resour. Technol 104(4), 325-329 (Dec 01, 1982) (5 pages) doi:10.1115/1.3230423 History: Received August 01, 1981; Revised March 23, 1982; Online October 22, 2009


A method for analyzing the dynamic behavior of marine pipelines subjected to impact loads or sudden forced movements is outlined. Inertia forces (also from hydrodynamic mass), hydrodynamic drag forces as well as friction and lift effects for a pipe at the sea bottom are accounted for. An extensive nonlinear formulation is used for the pipe itself; it includes large displacements and elasto-plastic material behavior. Aspects of the numerical formulation of the problem and the solution of the nonlinear dynamic equations are discussed. The examples show computed dynamic response for pipelines lying on the sea floor and for a pipe section freely submerged in water when subjected to various force and displacement histories.

Copyright © 1982 by ASME
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