A non-linear analysis of lying a floating pipeline on the seabed

García Palacios, Jaime and Samartín, Avelino and Negro Valdecantos, Vicente (2006). A non-linear analysis of lying a floating pipeline on the seabed. In: "IASS-APCS 2006", 16-19 de Octubre, 2006, Pekín (China). pp. 1-22.

Description

Title: A non-linear analysis of lying a floating pipeline on the seabed
Author/s:
  • García Palacios, Jaime
  • Samartín, Avelino
  • Negro Valdecantos, Vicente
Item Type: Presentation at Congress or Conference (Article)
Event Title: IASS-APCS 2006
Event Dates: 16-19 de Octubre, 2006
Event Location: Pekín (China)
Title of Book: Proceedings of the IASS-APCS 2006 International Symposium New Olympics. New Shell and Spatial Structures
Date: 2006
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Mecánica de Medios Continuos y Teoría de Estructuras
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In this article, a model for the determination of displacements, deformations and tensions of a submarine pipeline during the construction is presented. The process is carried out from an initial floating situation to the final laying position on the seabed. The existence of currents and small waves are also considered. Firstly, this technique, usually applied to polyethylene pipelines, is described in this paper as well as some real world examples, as well as the variables that can be modified to control the behavior of the structure. A detailed description of the actions in this process is considered, specially the ones related to marine environment, as Archimedes force, current and sea waves. The behavior of the pipeline is modeled with a non linear elasto dynamic model where geometric non linearities are taken into account. A 3-D beam model, without cross section deformation effects, is developed. Special care is taken in the numerical analysis, developed within an updated lagrangian formulation framework, with the sea bed contact, the follower forces due to the external water pressures and the dynamic actions. Finally, some subroutines are implemented into ANSYS to simulate the two dimensional case, where the whole construction process is achieved. With this software, a sensibility analysis of the bending moments, axial forces and stresses obtained with different values of the control variables in order to optimize the construction steps. These control variables are, the axial load in the pipe, the inundated inner length and the distance of the control barge from the coast.

More information

Item ID: 41490
DC Identifier: http://oa.upm.es/41490/
OAI Identifier: oai:oa.upm.es:41490
Deposited by: Biblioteca ETSI Caminos
Deposited on: 17 Jun 2016 09:42
Last Modified: 17 Jun 2016 09:42
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