The structural loads on a floating production, storage, and offloading platform induced by a large set of realistic (measured) abnormal waves are compared with the loads induced by “design storms” and also with the minimum values required by Classification Society rules. The design storms have a duration of 3h and correspond to the 100yr contour of the scatter diagram of the Northern North Sea. Time domain simulations are performed with a time domain seakeeping program that accounts for the most important nonlinear effects. The results are analyzed to obtain probability distributions of the sagging and hogging peaks of the vertical bending moment. Several theoretical distributions are fitted to the simulated realizations.

Issue Section:
Research Papers
Keywords:
bending, marine vehicles, probability, storms, wave mechanics
Topics:
Design, Storms, Stress, Waves, FPSO, Seas
1.
Guedes Soares
,
C.
,
Pascoal
,
R.
,
Antão
,
E. M.
,
Voogt
,
A.
, and
Buchner
,
B.
, 2007, “
An Approach to Calculate the Probability of Impact on a FPSO Bow
,”
ASME J. Offshore Mech. Arct. Eng.
0892-7219,
129
(
2
), pp.
73
–
80
.
Crossref
Search ADS
 
2.
Buchner
,
B.
, 1995, “
On the Impact of Green Water Loading on Ship and Offshore Unit Design
,”
Proceedings of the Sixth International Symposium on Practical Design of Ships and Mobile Units (PRADS’95)
,
H.
Kim
 and
J. W.
Lee
, eds.,
The Society of Naval Architects of Korea
, Seoul, Vol.
1
, pp.
430
–
443
.
3.
Buchner
,
B.
, 2002, “
Green Water on Ship-Type Offshore Structures
,” Ph.D. thesis Delft University of Technology.
4.
Hellan
,
Ø.
,
Hermundstad
,
O. A.
, and
Stansberg
,
C. T.
, 2001, “
Design Tool for Green Sea, Wave Impact, and Structural Response on Bow and Deck Structures
,”
Offshore Technol. Conference
, Houston, TX, Paper No. OTC 13213.
5.
Guedes Soares
,
C.
,
Fonseca
,
N.
, and
Pascoal
,
R.
, 2006, “
Abnormal Wave Induced Load Effects in Ship Structures
,”
J. Ship Res.
0022-4502,
52
(
1
), pp.
30
–
44
.
6.
Guedes Soares
,
C.
,
Cherneva
,
Z.
, and
Antão
,
E. M.
, 2003, “
Characteristics of Abnormal Waves in North Sea Storm Sea States
,”
Appl. Ocean. Res.
0141-1187,
25
, pp.
337
–
344
.
Crossref
Search ADS
 
7.
Faulkner
,
D.
, and
Buckley
,
W. H.
, 1997, “
Critical Survival Conditions for Ship Design
,”
Proceedings of the International Conference on Design and Operation for Abnormal Conditions
, RINA Paper No. 6, pp.
1
–
25
.
8.
Fonseca
,
N.
,
Guedes Soares
,
C.
, and
Pascoal
,
R.
, 2001, “
Prediction of Ship Dynamic Loads in Ship in Heavy Weather
,”
Proceedings of the Conference on Design and Operation for Abnormal Conditions II (RINA)
, London, United Kingdom, pp.
169
–
182
.
9.
Clauss
,
G. F.
,
Schmittner
,
C.
,
Hennig
,
J.
,
Guedes Soares
,
C.
,
Fonseca
,
N.
, and
Pascoal
,
R.
, 2004, “
Bending Moments on a FPSO in Rogue Waves
,”
Proceedings of the 23rd International Conference On Offshore Mechanics and Arctic Engineering (OMAE’04)
, ASME Paper No. OMAE2004-51504.
10.
Guedes Soares
,
C.
,
Fonseca
,
N.
,
Pascoal
,
R.
,
Clauss
,
G. F.
,
Schmittner
,
C.
, and
Hennig
,
J.
, 2006, “
Analysis of the Wave Induced Loads on a FPSO Due to Abnormal Waves
,”
ASME J. Offshore Mech. Arct. Eng.
0892-7219,
128
, pp.
241
–
247
.
Crossref
Search ADS
 
11.
Fonseca
,
N.
,
Guedes Soares
,
C.
, and
Pascoal
,
R.
, 2005, “
Vertical Bending Moments Induced by a Set of Abnormal Waves on a Containership
,”
Proceedings of the Conference on Design and Operation for Abnormal Conditions III (RINA)
, London, United Kingdom.
12.
Fonseca
,
N.
,
Guedes Soares
,
C.
, and
Pascoal
,
R.
, 2005, “
Global Loads on a FPSO Induced by a Set of Freak Waves
,”
Proceedings of the 24th International Conference on Offshore Mech., and Arctic Eng., (OMAE2005)
, ASME Paper No. OMAE2005-6722.
13.
Fonseca
,
N.
, and
Guedes Soares
,
C.
, 1998, “
Time-Domain Analysis of Large-Amplitude Vertical Motions and Wave Loads
,”
J. Ship Res.
0022-4502,
42
(
2
), pp.
100
–
113
.
14.
Fonseca
,
N.
, and
Guedes Soares
,
C.
, 1998, “
Nonlinear Wave Induced Responses of Ships in Irregular Seas
,”
Proceedings of the 12th International Conference on Offshore Mech. and Arctic Engineering (OMAE’98)
, New York, ASME Paper 98 0446.
15.
Winterstein
,
S. R.
,
Ude
,
T. C.
,
Cornell
,
C. A.
,
Bjerager
,
P.
, and
Haver
,
S.
, 1993, “
Environmental Parameters for Extreme Response: Inverse FORM with Omission Factors
,”
Proceedings of International Conference on Structural Safety and Reliability (ICOSSAR93)
, Austria.
16.
Naess
,
A.
, 1985, “
On the Statistical Distribution of Crest to Trough Wave Heights
,”
Ocean Eng.
0029-8018,
12
, pp.
221
–
234
.
Crossref
Search ADS
 
17.
Guedes Soares
,
C.
, 1989, “
Transient Responses of Ship Hull to Wave Impact
,”
Int. Shipbuild. Prog.
0020-868X,
36
(
406
), pp.
137
–
156
.
18.
Guedes Soares
,
C.
,
Fonseca
,
N.
, and
Pascoal
,
R.
, 2004, “
Comparison of Present Wave Induced Load Criteria With Loads Induced by an Abnormal Wave on Marine Structures
,”
Rogue Waves 2004
,
IFREMER
,
Brest
.
19.
Haver
,
S.
, and
Karunakaran
,
D.
, 1998, “
Probabilistic Description of Crest Heights of Ocean Waves
,”
Proceedings of the Fifth International Workshop on Wave Hindcasting and Forecasting
,
Melbourne, FL
.
20.
Guedes Soares
,
C.
,
Cherneva
,
Z.
, and
Antão
,
E. M.
, 2004, “
Abnormal Waves During Hurricane Camille
,”
J. Geophys. Res.
0148-0227,
109
,
C08008
.
21.
Juncher
,
J. J.
,
Beck
,
R. F.
,
Du
,
S.
,
Faltinsen
,
O. M.
,
Fonseca
,
N.
,
Rizzuto
,
E.
,
Stredulinsky
,
D.
, and
Watanabe
,
I.
, 2000, “
Extreme Hull Girder Loading
,”
Proceedings of the 14th International Ship and Offshore Structures Congress (ISSC’2000)
,
H.
Ohtsubo
 and
Y.
Sumi
, eds.,
Elsevier Science
,
New York
, Vol.
2
, pp.
263
–
320
.
Copyright © 2008
 by American Society of Mechanical Engineers
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