AN ANALYSIS OF PARAMETRIC INSTABILITY OF RISERS

Authors

  • FABIO SELLEIO PRADO
  • FERNANDO YUDI SAKAMOTO
  • CARLOS EDUARDO NIGRO MAZZILLI

Keywords:

FINITE-ELEMENT MODELING, REDUCED-ORDER MODELING, RISER, PARAMETRIC INSTABILITY, NONLINEAR DYNAMICS, UNILATERAL CONTACT.

Abstract

IN THIS WORK, THREE CATENARY RISER MODELS SUBJECTED TO HARMONIC OSCILLATIONS ARE STUDIED. TWO ARE FINITE-ELEMENT MODELS, ONE STUDIED WITH ORCAFLEX, AN OFFSHORE MARINE SYSTEM ANALYSIS SOFTWARE, AND ANOTHER ONE WITH ABAQUS, A GENERALIST STRUCTURAL ANALYSIS SOFTWARE. THE THIRD MODEL IS AN ANALYTICAL REDUCED-ORDER MODEL THAT REPRESENTS ONLY THE TOUCH-DOWN ZONE. THE AIM OF THIS STUDY IS TO DISCUSS THE FEASIBILITY, POTENTIALITIES AND LIMITATIONS OF THE GENERALIST SOFTWARE AND THE ANALYTICAL MODEL IN CONFRONTATION WITH THE SPECIALIST SOFTWARE FOR THE ANALYSIS OF RISERS, UNDER CONDITIONS OF PARAMETRIC EXCITATION AND UNILATERAL CONTACT AT THE SEABED.

Author Biographies

FABIO SELLEIO PRADO

STRUCTURAL DEPARTMENT (PEF) OF ESCOLA POLITÉCNICA OF THE UNIVERSITY OF SÃO PAULO

FERNANDO YUDI SAKAMOTO

STRUCTURAL DEPARTMENT (PEF) OF ESCOLA POLITÉCNICA OF THE UNIVERSITY OF SÃO PAULO

CARLOS EDUARDO NIGRO MAZZILLI

STRUCTURAL DEPARTMENT (PEF) OF ESCOLA POLITÉCNICA OF THE UNIVERSITY OF SÃO PAULO

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Published

2013-08-31

Issue

Vol. 11 No. 3 (2014)

Section

Articles

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