Periodic and Fixed Boundary Conditions for Multi-Scale Finite Element Analysis of Flexible Risers

Mohammad Rahmati, Giulio Alfano, Hamid Bahai

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

3 Citations (Scopus)

Abstract

In this paper the implementation of two types of boundaries, periodic and fixed in-plane boundaries, for a detailed finite-element model of flexible risers is discussed. By 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 several riser models with various lengths and layers. It is shown that the model with periodic boundaries can be effectively employed in a fully-nested (FE2) multiscale analysis based on computational homogenization. In fact, in this model only a small fraction of a flexible pipe is needed for a detailed nonlinear finite-element analysis at the small scale. The advantage of applying periodic boundary conditions in capturing the detailed nonlinear effects and the efficiencies in terms of significant CPU time saving are demonstrated.
Original languageEnglish
Title of host publicationASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering
Subtitle of host publicationVolume 5: Pipelines, Risers, and Subsea Systems
PublisherAmerican Society of Mechanical Engineers(ASME)
Number of pages7
Volume5
ISBN (Electronic)9780791849965
DOIs
Publication statusPublished - 19 Jun 2016
Externally publishedYes
EventASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering - Busan, Korea, Republic of
Duration: 19 Jun 201624 Jun 2016

Conference

ConferenceASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering
CountryKorea, Republic of
CityBusan
Period19/06/1624/06/16

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