Design criteria based on LRFD format is proposed here for FPSO structural design. The design criteria of FPSO structures accounts for load effects and their probabilistic distributions, in which an “Environmental Severity Factor” is introduced for considering the site-specific conditions of hydrodynamic loading; and for limit states for three types of failure modes: primary, secondary and tertiary. The method presented in this paper can be applied to develop structural design criteria for new-built FPSO and converted FPSO from oil tankers.

Issue Section:
Technical Papers
Keywords:
structural engineering, design engineering, ships, oceanographic equipment, oil technology, storage units, Floating Production, Storage and Offloading Units (FPSO), Structural Design Criteria, LRFD Format
Topics:
FPSO, Reliability, Ships, Stress, Structural design, Failure mechanisms, Hull, Design
1.
Guedes Soares, C., 1998, “Ship Structural Reliability,” Risk and Reliability in Marine Technology, C. Guedes Soares ed., Balkema, pp. 227–244.
2.
Teixeira, A. and Guedes Soares, C., 1998, “On the Reliability of Ship Structures in Different Coastal Areas,” Structural Safety and Reliability, Shiraishi, Shinozuka and Wen, eds., A. A. Balkema, Japan, pp. 2073–2076.
3.
Guedes Soares
,
C.
,
1990
, “
Stochastic Modelling of Maximum Still-Water Load Effects in Ship Structures
,”
J. Ship Res.
,
34
(
3
), pp.
199
–
205
.
4.
Wang
,
X.
,
Jiao
,
G.
, and
Moan
,
T.
,
1996
, “
Analysis of Oil Production Ships Considering Load Combination, Ultimate Strength and Structural Reliability
,”
Transactions SNAME
,
104
, pp.
3
–
30
.
5.
IACS Requirement S11, 1995, Longitudinal Strength Standards.
6.
Fonseca
,
N.
, and
Guedes
,
Soares, C.
,
1998
, “
Time-Domain Analysis of Large-Amplitude Vertical Ship Motions and Wave Loads
,”
J. Ship Res.
,
42
(
2
), pp.
139
–
153
.
7.
Watanabe
,
I.
, and
Guedes Soares
,
C.
,
1999
, “
Comparative Study on the Time-Domain Analysis of Non-Linear Ship Motions and Loads
,”
Mar. Struct.
12
(
3
), pp.
153
–
170
.
8.
Jensen, 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), October 2–6, Nagasaki, Japan, Vol. 2, pp. 236–320.
9.
Guedes Soares, C., Fonseca, N., and Pascoal, R., 2001, “Experimental and Numerical Study of the Motions of a Turret Moored FPSO in Waves,” Proc. of the 20th Int. Conf. on Offshore Mechanics and Arctic Engineering (OMAE’01), Paper OMAE2001/OFT-1071, ASME, New York.
10.
Guedes Soares, C., and Schellin, T. E., 1996, “Nonlinear Effects on Long Term Distributions of Wave Induced Loads for Tankers,” Proc. of the 15th Int. Conf. on Offshore Mechanics and Arctic Engineering (OMAE’96), C. Guedes Soares, et al., eds., ASME, New York, Vol. II, pp. 79–85.
11.
Zhao, C., Bai, Y., and Shin, Y., 2000, “Extreme Response and Fatigue Assessments for FPSO Structural Analysis,” Proc. of 11th ISOPE, Stavanger, Norway.
12.
Guedes
,
Soares, C.
, and
Moan
,
T.
,
1991
, “
Model Uncertainty in the Long Term Distribution of Wave Induced Bending Moments for Fatigue Design of Ship Structures
,”
Mar. Struct.
,
4
, pp.
295
295
.
13.
ABS Guide for Building and Classing of Floating Production, Storage and Offloading Systems (Revised). May 2000.
14.
Guedes Soares
C.
,
1992
, “
Combination of Primary Load Effects in Ship Structures
,”
Probab. Eng. Mech.
,
7
, pp.
103
–
111
.
15.
DnV, 2000, Structural Design of Offshore Ships, Offshore Standard OS-C102, Draft 23.6.2000.
16.
Mansour, A. E., 1997, Assessment of Reliability of Ship Structures, Ship Structure Committee, SSC-398.
17.
Gordo
,
J. M.
,
Guedes Soares
,
C.
, and
Faulkner
,
D.
,
1996
, “
Approximate Assessment of the Ultimate Longitudinal Strength of the Hull Girder
,”
J. Ship Res.
,
4
(
1
), pp.
60
–
69
.
18.
ISSC Special Task Committee, 2000, VI.II. Proc. 14th ISSC, Nagasaki, Japan.
19.
Sun, H. H., and Bai, Y., 2001, “Ultimate Strength and Reliability Assessment for the Ship Hull Girders Used in Issc-2000 Benchmark Study,” Proc. PRADS-2001, Shanghai, China.
20.
Hughes, O. F., 1983, Ship Structural Design, New York, Wiley.
21.
Guedes Soares
,
C.
,
1988
, “
Design Equation for the Compressive Strength of Unstiffened Plate Elements with Initial Imperfections
,”
J. of Constructional Steel Research
,
9
(
4
), pp.
287
–
310
.
22.
Sun, H. H., Xiao, T. Y., and Zhang, S. K., 1999, “Reliability Analysis Based on Ultimate Strength of Midsections for Corroding Ship Primary Hulls,” Proceedings of 18th OMAE, ASME, New York, paper OMAE99/S&R-6007.
23.
Melchers, R E., 1999, Structural Reliability Analysis and Prediction, John Wiley & Sons, NY.
24.
Kim, B. J., and Kim, O. H., 1995, “Design Criteria of Longitudinal Hull Girder Strength Based on Reliability Analysis,” Proc. PRADS’95, Seoul, Korea.
25.
Galambos
,
T. V.
, and
Ravindra
,
M. K.
,
1978
, “
Properties of Steel for Use in LRFD
,”
J. Struct. Div. ASCE
,
104
(
9
), pp.
1459
–
1468
.
26.
Lotsberg, I., 1991, “Target Reliability Index, A Literature Survey,” Report No. 91-2023, A. S. Veritas Research, Norway.
27.
Guedes Soares
,
C.
,
Dogliani
,
M.
,
Ostergaard
,
C.
,
Parmentier
,
G.
, and
Pedersen
,
P. T.
,
1996
, “
Reliability Based Ship Structural Design
,”
Transactions SNAME
,
104
, pp.
375
–
389
.
28.
ABS, 2001, Rule Requirements for Survey After Construction.
29.
Guedes Soares
,
C.
, and
Garbatov
,
Y.
,
1999
, “
Reliability of Maintained Ship Hulls Subjected to Corrosion and Fatigue under Combined Loading
,”
J. of Constructional Steel Research
,
52
(
1
), pp.
93
–
115
.
Copyright © 2003
 by ASME
You do not currently have access to this content.