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A Finite Element Model for Umbilical Cable Crushing Analysis

[+] Author Affiliations
Caio C. P. Santos, Celso P. Pesce, Rafael Salles, Guilherme R. Franzini

University of São Paulo, São Paulo, Brazil

Rafael L. Tanaka

Prysmian Surflex, Cariacica, Brazil

Paper No. OMAE2015-41622, pp. V05AT04A043; 11 pages
doi:10.1115/OMAE2015-41622
From:
  • ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 5A: Pipeline and Riser Technology
  • St. John’s, Newfoundland, Canada, May 31–June 5, 2015
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5651-2
  • Copyright © 2015 by ASME

abstract

Umbilical cables are essential elements of offshore floating production systems. Due to their complexity, the offshore industry regularly counts on numerical tools to perform design assignments. One of these assignments is to evaluate strains and stresses states in all components due to distinct sets of external loads. The main purpose of this paper is to present a numerical model for prediction of the stress and strain fields in the umbilical cable components under crushing loads. Such loads, outcoming from the laying operation, comprise the caterpillar shoes load and the squeezing effects, associated not only to the tensile armours, but also to helical components under tension. The referred model comprises a joint analysis using a two-dimensional Finite Element Method (FEM) fed by an analytical model, which represent three-dimensional effects. A combined analytical-numerical approach is much easier to implement than a complete fully three-dimensional one and it is meant to obtain results efficiently, without the need of a large computational capacity. The paper presents and discuss modeling hypotheses and methodology, describing in which way three-dimensional effects and interactions among cable components were treated. Case studies with three umbilical cables are presented.

Copyright © 2015 by ASME

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