A design method is presented, which aims at the optimal cross-sectional layout of the multilayer steel tube umbilical. The merit of the method is to improve the tension stiffness and the fatigue life of umbilical. An optimization model is developed for arranging each component layer of the layout by considering the symmetry of mechanical performances of components. Finite element analysis (FEA) is carried out to check the contact force and the radial deformation of different layout types and to confirm the optimal layout design.

References

References
1.
ISO 13628-5
,
2009
, “Petroleum and Natural Gas Industries—Design and Operation of Subsea Production Systems—Part 5: Subsea Umbilicals.”
2.
Knapp
,
R. H.
,
Le
,
T. T.
, and
Cruickshank
,
M. J.
,
1991
, “
Design Methodology for Undersea Umbilical Cables
,”
Proceedings of Ocean Technologies and Opportunities
,
Honolulu, Hawaii
, Oct. 1–3, pp.
1319
1327
.
3.
Le
,
T. T.
, and
Knapp
,
R. H.
,
1994
, “
A Finite Element Model for Cables With Nonsymmetrical Geometry and Loads
,”
ASME J. Offshore Mech. Arct. Eng.
,
116
(
1
), pp.
14
20
.10.1115/1.2920121
4.
Knapp
,
R. H.
, and
Shimabukuro
,
T. S.
,
2007
, “
Structural Analysis of Composite Umbilical Cables
,”
16th International Offshore and Polar Engineering Conference
,
Lisbon, Portugal
, July 1–6, pp.
3487
3491
.
5.
Custódio
,
A. B.
, and
Vaz.
,
M. A.
,
2002
, “
A Nonlinear Formulation for the Axisymmetric Response of Umbilical Cables and Flexible Pipes
,”
Appl. Ocean Res.
,
24
(
1
), pp.
21
29
.10.1016/S0141-1187(02)00007-X
6.
Witz
,
J. A.
, and
Tan
,
Z.
,
1992
, “
On the Axial-Torsional Structural Behaviors of Flexible Pipes, Umbilical and Marine Cables
,”
Mar. Struct.
,
5
, pp.
205
227
.10.1016/0951-8339(92)90029-O
7.
Witz
,
J. A.
, and
Tan
,
Z.
,
1992
, “
On the Flexural Structural Behaviors of Flexible Pipes, Umbilical and Marine Cables
,”
Mar. Struct.
,
5
, pp.
229
249
.10.1016/0951-8339(92)90030-S
8.
Savik
,
S.
, and
Ekeberg
,
K. I.
,
2002
, “
Non-Linear Stress Analysis of Complex Umbilical Cross-sections
,”
21st International Conference on Offshore Mechanics and Arctic Engineering
,
Oslo, Norway
, June 23–28, Paper No. OMAE 2002-28126.
9.
Sævik
,
S.
, and
Bruaseth
,
S.
,
2005
, “
Theoretical and Experimental Studies of the Axisymmetric Behaviour of Complex Umbilical Cross-Sections
,”
Appl. Ocean Res.
,
27
(
2
), pp.
97
106
.10.1016/j.apor.2005.11.001
10.
Probyn
,
I.
,
Dobson
,
A.
, and
Martinez
,
M.
,
2007
, “
Advances in 3-D FEA Techniques for Metallic Tube Umbilicals
,”
17th International Offshore and Polar Engineering Conference
,
Lisbon, Portugal
, July 1–6, pp.
848
854
.
11.
Corre
,
V. L.
, and
Probyn
,
I.
,
2009
, “
Validation of a w-Dimensional Finite Element Analysis Model of a Deep Water Steel Tube Umbilical in Combined Tension and Cycle Bending
,”
23rd International Conference on Ocean, Offshore and Arctic Engineering
,
Honolulu, Hawaii
, May 31–June 5, Paper No. OMAE 2009-79168.
12.
Knapp
,
R. H.
,
1979
, “
Derivation of a New Stiffness Matrix for Helically Armoured Cables Considering Tension and Torsion
,”
Int. J. Numer. Methods Eng.
,
14
, pp.
515
529
.10.1002/nme.1620140405
13.
Lu
,
M. W.
, and
Luo
,
X. F.
,
2001
,
Basis Elastic Theory
,
2nd ed.
, Higher Education Press,
Beijing (in Chinese)
.
14.
Kavanagh
,
W. K.
,
Doynov
,
K.
,
Gallagher
,
D.
, and
Bai
,
Y.
,
2004
, “
The Effect of Tube Friction on the Fatigue Life of Steel Tube Umbilical Risers—New Approaches to Evaluating Fatigue Life Using Enhanced Nonlinear Time Domain Methods
,”
Offshore Technology Conference
,
Houston, TX
, May 3–6, Paper No. 16631.
You do not currently have access to this content.