Abstract

This paper presents an efficient method for determining capsize risk for a given seaway and ship operational condition using time domain simulations. The risk of capsize during 1 h exposure to a given seaway is dependent on the wave process realization, which is determined by a seed number and resulting random wave phases. The dependence of maximum roll angle on wave process can be modeled by fitting a suitable distribution to maximum roll angles from a moderate number of simulations. Sample computations for a naval frigate demonstrate that a Gumbel distribution provides a very good fit to maximum roll angles from different wave realizations. [S0892-7219(00)00402-7]

Issue Section:
Technical Papers
Keywords:
oceanographic equipment, structural engineering, risk management, ships, ocean waves, water waves, stability
Topics:
Risk, Ships, Simulation, Engineering simulation, Probability, Waves
1.
de Kat, J. O., Brouwer, R., McTaggart, K., and Thomas, L., 1994, “Intact Ship Survivability in Extreme Waves: Criteria from a Research and Navy Perspective,” STAB ’94, Fifth International Conference on Stability of Ships and Ocean Vehicles, Melbourne, FL.
2.
Mansour
,
A. E.
,
Wirsching
,
P. H.
,
Lucket
,
M. D.
,
Plumpton
,
A. M.
, and
Lin
,
Y. H.
,
1997
, “
Structural Safety of Ships
,”
Soc. Nav. Archit. Mar. Eng., Trans.
,
105
, pp.
61
–
98
.
3.
Sarchin
,
T. H.
, and
Goldberg
,
L. L.
,
1962
, “
Stability and Buoyancy Criteria for U.S. Naval Surface Ships
,”
Soc. Nav. Archit. Mar. Eng., Trans.
,
70
, pp.
418
–
458
.
4.
McTaggart, K. A., 1999, “Ship Capsize Risk in a Seaway Using Time Domain Simulations and Fitted Gumbel Distributions,” 18th International Conference on Offshore Mechanics and Arctic Engineering—OMAE99, St. John’s, Newfoundland, Canada.
5.
de Kat, J. O., 1993, “The Development of Survivability Criteria Using Numerical Simulations,” United States Coast Guard Vessel Stability Symposium ’93, New London, CT.
6.
Hooft
,
J. P.
, and
Pieffers
,
J. B. M.
,
1988
, “
Maneuverability of Frigates in Waves
,”
Marine Technol.
,
25
, No.
4
, pp.
262
–
271
.
7.
de Kat, J. O., and Thomas, W. L., 1998, “Extreme Rolling, Broaching, and Capsizing—Model Tests and Simulations of a Steered Ship in Waves,” 22nd Symposium on Naval Hydrodynamics, Washington, DC.
8.
Dahle
,
E. A.
, and
Myrhaug
,
D.
,
1994
, “
Risk Analysis Applied to Capsize of Smaller Vessels in Breaking Waves
,”
Trans R. Inst. Nav. Arch.
,
136
, pp.
237
–
252
.
9.
Dahle
,
E. A.
, and
Myrhaug
,
D.
,
1996
, “
Capsize Risk of Fishing Vessels
,”
Schiffstechnik (Ship Technology Research)
,
43
, pp.
164
–
171
.
10.
Kobylinski, L. K., 1997, “Rational Approach to Ship Safety Requirements,” Second International Conference on Marine Technology, Szczecin, Poland, pp. 3–13.
11.
Bales, S. L., 1984, “Development and Application of a Deep Water Hind-cast Wave and Wind Climatology,” Royal Institute of Naval Architects Wave and Wind Climate World Wide Symposium, London, UK.
12.
British Maritime Technology Limited, 1986, Global Wave Statistics, Unwin Brothers, London, UK.
13.
Belenky, V., Degtyarev, A., Boukhanovsky, A., and Nechaev, Y., 1998, “Applications of Stochastic Processes for Probabilistic Ship Stability Assessment: Problems and Solutions,” Stochastic Processes and Their Applications, Corvallis, OR.
14.
Madsen, H. O., Krenk, S., and Lind, N. C., 1986, Methods of Structural Safety, Prentice-Hall, Englewood Cliffs, NJ.
15.
Thoft-Christensen, P., and Baker, M. J., 1982, Structural Reliability and Its Applications, Springer-Verlag, Berlin, Germany.
16.
Bury, K. V., 1975, Statistical Models in Applied Science, Wiley, New York, NY.
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