A case study in the cross-section analysis of flexible risers

This paper presents a case study in the structural analysis of a non-bonded flexible riser cross-section. This study was initiated by the International Ship and Offshore Structures Congress (ISSC), Committee V7-Slender Marine Structures and is briefly described in the 1994 report presented in St John's, Newfoundland, Canada. The paper provides full documentation of the case study. Analytical results were provided by 10 different institutions for a Coflexip flexible riser design. These results are compared with available experimental data. Despite the complexity of the flexible riser cross-section, the various methods used by the participants broadly agree with the experimental data for the axial-torsional structural response provided that layer interaction was taken into account in the various models. However, significant differences in the results were observed with the flexural structural response.

[1]  C. L. Bournazel,et al.  CALCULATION OF STRESSES AND SLIP IN STRUCTURAL LAYERS OF UNBONDED FLEXIBLE PIPES , 1987 .

[2]  J.M.M. Out.  On the Prediction of the Endurance Strength of Flexible Pipe , 1989 .

[3]  Annette M. Harte,et al.  THREE DIMENSIONAL ANALYTICAL SIMULATION OF FLEXIBLE PIPE WALL STRUCTURE , 1992 .

[4]  S. A. Løtveit,et al.  Increased Reliability Through a Unified Analysis Tool for Bonded and Non-Bonded Pipes , 1990 .

[5]  M. Araki,et al.  Analytical Study of the Mechanical Strength of Flexible Pipes , 1987 .

[6]  C. Bert,et al.  Theory of wire rope , 1990 .

[7]  T. T. Nagy,et al.  Modified model for the description of the behaviour of reinforced rubber hoses , 1986 .

[8]  Robert Lewis Reuben,et al.  Mechanical behaviour of the metallic elements of submarine cables as a function of cable loading , 1995 .

[9]  J. A. Witz,et al.  On the flexural structural behaviour of flexible pipes, umbilicals and marine cables , 1992 .

[10]  A. Cardou,et al.  A Numerical Comparison of Current Mathematical Models of Twisted Wire Cables Under Axisymmetric Loads , 1991 .

[11]  R. H. Knapp,et al.  Design Methodology For Undersea Umbilical Cables , 1991, OCEANS 91 Proceedings.

[12]  D. B. McIver.  A method of modelling the detailed component and overall structural behaviour of flexible pipe sections , 1995 .

[13]  Carl M. Larsen.  Flexible riser analysis — comparison of results from computer programs , 1992 .

[14]  A. Love.  A treatise on the mathematical theory of elasticity , 1892 .

[15]  J. A. Witz,et al.  On the axial-torsional structural behaviour of flexible pipes, umbilicals and marine cables , 1992 .