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Ocean Systems Engineering
  Volume 5, Number 4, December 2015, pages 301-318
DOI: http://dx.doi.org/10.12989/ose.2015.5.4.301
 


A shell-dynamics model for marine pipelines of large suspended length
Stefanos A. Katifeoglou and Ioannis K. Chatjigeorgiou

 
Abstract
    The present investigations introduce the shell-finite element discretization for the dynamics of slender marine pipelines. A long catenary pipeline, corresponding to a particular Steel Catenary Riser (SCR), is investigated under long-standing cyclic loading. The long structure is divided into smaller tubular parts which are discretized with 8-node planar shell elements. The transient analysis of each part is carried out by the implicit time integration scheme, within a Finite Elements (FE) solver. The time varying external loads and boundary conditions on each part are the results of a prior solution of an integrated line-dynamics model. The celebrated FE approximation can produce a more detailed stress distribution along the structural surface than the simplistic \"line-dynamics\" approach.
 
Key Words
    offshore applications; SCR; sagbend; nonlinear dynamics; planar shells
 
Address
Stefanos A. Katifeoglou and Ioannis K. Chatjigeorgiou:School of Naval Architects, Division of Marine Structures, National Technical University of Athens, 9 Heroon Polytechniou Ave, GR157-73, Zografos Campus, Athens, Greece
 

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