Abstract
Thick tube theory is incorporated into an existing analytical model for the three-dimensional analysis of layered flexible pipe cross-sections under offshore loading conditions. The original model considers material layers as isotropic/ orthotropic thin tubes and helically wound reinforcing cables are modelled individually. The improvement in the results obtained with the incorporation of the new thick tube layer is demonstrated for a flexible pipe with D/t=5. Extensive finite element tests, which have been carried out in order to verify the overall modelling theory, are described. Pipe sections are discretised using axisymmetric elements for the tube type layers and special discrete reinforcement elements for the helical cables. A particular example of a three layer doubly reinforced pipe section under internal pressure is studied. Good agreement was found between the analytical model and finite element results for all the main deformation and stress quantities including cable stresses. (A)
| Original language | English |
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| Journal | [No source information available] |
| Publication status | Published - 1990 |