A mooring system optimization program has been developed to minimize the cost of offshore mooring systems. This paper describes an application of the optimization program constructed based on the recently developed harmony search (HS) optimization algorithm to offshore mooring design which requires significant number of design cycles. The objective of the anchor leg system design is to minimize the mooring cost with feasible solutions that satisfy all the design constraints. The HS algorithm is adopted from a jazz improvisation process to find solutions with the optimal cost. This mooring optimization model was integrated with a frequency-domain global motion analysis program to assess both cost and design constraints of the mooring system. As a case study, a single-point mooring system design of floating production storage and offloading (FPSO) in deepwater was considered. It was found that optimized design parameters obtained by the HS model were feasible solutions with the optimized cost. The results show that the HS-based mooring optimization model can be used to find feasible mooring systems of offshore platforms with the optimal cost.

References

References
1.
Fylling
,
I.
,
1997
, “
Optimization of Deepwater Mooring Systems
,”
Offshore Mediterranean Conference
, Ravenna, Italy, pp.
69
80
.
2.
Fylling
,
I.
, and
Kleiven
,
G.
,
2000
, “
Integrated Optimized Design of Riser and Mooring System for Floating Production Vessels
,”
OMAE 2000 Conference, Ocean Engineering Symposium
, New Orleans, LA.
3.
Geem
,
Z. W.
,
Kim
,
J. H.
, and
Loganathan
,
G. V.
,
2001
, “
A New Heuristic Optimization Algorithm: Harmony Search
,”
Simulation
,
76
(
2
), pp.
60
68
.
4.
Geem
,
Z. W.
,
2006
, “
Optimal Cost Design of Water Distribution Networks Using Harmony Search
,”
Eng. Optim.
,
38
(
3
), pp.
259
277
.
5.
Geem
,
Z. W.
,
2006
, “
Parameter Estimation for the Nonlinear Muskingum Model Using BFGS Technique
,”
J. Irrig. Drain. Eng.
,
132
(
5
), pp.
474
478
.
6.
Gabrys
,
B.
,
Howlett
,
R. J.
, and
Jain
,
L. C.
,
2006
, “
Knowledge-Based Intelligent Information and Engineering Systems
,”
Improved Harmony Search From Ensemble of Music Players
(Lecture Notes in Computer Science), Vol.
4251
,
Springer
,
Berlin
, pp.
86
93
.
7.
Kim
,
J. H.
,
Geem
,
Z. W.
, and
Kim
,
E. S.
,
2001
, “
Parameter Estimation of the Nonlinear Muskingum Model Using Harmony Search
,”
J. Am. Water Resour. Assoc.
,
37
(
5
), pp.
1131
1138
.
8.
Duggal
,
A. S.
, and
Ryu
,
S.
,
2005
,
Fluid Structure Interactions and Moving Boundary Problems
,
WIT Press
,
Ashurst
,
Southampton, UK
, pp.
269
278
.
9.
Ryu
,
S.
,
Duggal
,
A. S.
,
Heyl
,
C. N.
, and
Liu
,
Y.
,
2006
, “
Prediction of Deepwater Oil Offloading Buoy Response and Experimental Validation
,”
Int. J. Offshore Polar Eng.
,
16
(
4
), pp.
290
296
.
10.
Wyllie
,
M.
,
2004
, “
Fast Track FPSO's for Deepwater and Ultra-Deepwater
,”
Offshore Technology Conference
, Houston, TX, Paper No. OTC 16708.
11.
Simpson
,
A. R.
,
Dandy
,
G. C.
, and
Murphy
,
L. J.
,
1994
, “
Generic Algorithms Compared to Other Techniques for Pipe Optimization
,”
J. Water Resour. Plann. Manage.
,
120
(
4
), pp.
423
443
.
12.
Cunha
,
M. C.
, and
Sousa
,
J.
,
1999
, “
Water Distribution Network Design Optimization: Simulated Annealing Approach
,”
J. Water Resour. Plann. Manage.
,
125
(
4
), pp.
215
221
.
13.
Lippai
,
I.
,
Heaney
,
J. P.
, and
Laguan
,
M.
,
1999
, “
Robust Water System Design With Commercial Intelligent Search Optimizers
,”
J. Comput. Civ. Eng.
,
13
(
3
), pp.
135
143
.
14.
Lee
,
K. S.
, and
Geem
,
Z. W.
,
2005
, “
A New Meta-Heuristic Algorithm for Continuous Engineering Optimization: Harmony Search Theory and Practice
,”
Comput. Methods Appl. Mech. Eng.
,
194
(
36–38
), pp.
3902
3933
.
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