publication . Article . 2016

An accurate and computationally efficient small-scale nonlinear FEA of flexible risers

Giulio Alfano; Hamid Bahai; Mohammad Rahmati;
Open Access
  • Published: 15 Jul 2016 Journal: Ocean Engineering, volume 121, pages 382-391 (issn: 0029-8018, Copyright policy)
  • Publisher: Elsevier BV
  • Country: United Kingdom
Abstract
This paper presents a highly efficient small-scale, detailed finite-element modelling method for flexible risers which can be effectively implemented in a fully-nested (FE2) multiscale analysis based on computational homogenisation. By exploiting cyclic symmetry and applying periodic boundary conditions, only a small fraction of a flexible pipe is used for a detailed nonlinear finite-element analysis at the small scale. In this model, using three-dimensional elements, all layer components are individually modelled and a surface-to-surface frictional contact model is used to simulate their interaction. The approach is applied on a 5-layered pipe made of inner, ou...
Subjects
free text keywords: flexible risers, frictional contact, periodic boundary condition, FE modelling, Environmental Engineering, Ocean Engineering, H100
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