Fluid – structure interaction study for the DIFIS System’s composite riser tube

  • S. D. Fanourgakis Mechanical Engineering and Aeronautics Department, University of Patras, Patras, Greece
  • D. E. Mazarakos Mechanical Engineering and Aeronautics Department, University of Patras, Patras, Greece
  • V. Kostopoulos Mechanical Engineering and Aeronautics Department, University of Patras, Patras, Greece
Keywords: 2 – way FSI, Composite riser tube, DIFIS System, Abaqus

Abstract

DIFIS System was developed for oil recovery from shipwrecks and for the elimination of the pollution threat during EU FP-6 framework. The installation time’s reduction in cases of environmental pollution is a crucial factor for DIFIS system design. In the current work, the polyethylene riser tube parts (15 meter) of DIFIS System was replaced by a composite riser tube parts (30 meter) succeeding lower installation time for the DIFIS’s riser. The analysis and development of composite riser was based on the verified 2 – way fluid structure interaction (FSI) results from polyethylene riser. A methodology based on polyethylene riser’s normal modes (target values) was proposed and the composite riser’s structural integrity was investigated in order to reach these target values. The normal modes analysis and the 2 – way fluid structure interaction simulation were performed in ABAQUS software. The composite riser’s dynamic response under sea current is significant better than polyethylene riser (lower displacements in both axes, parallel and vertical to flow). In overall, the time reduction of the DIFIS’ risers installation by 40% was achieved, using longer riser parts.

Published
2018-12-27
How to Cite
Fanourgakis, S. D., Mazarakos, D. E., & Kostopoulos, V. (2018). Fluid – structure interaction study for the DIFIS System’s composite riser tube. Journal of Mechanical Engineering and Sciences, 12(4), 4243-4262. https://doi.org/10.15282/jmes.12.4.2018.19.0365