Random simulations are often used to simulate the statistics of storm-driven waves. Work on Gaussian linear random signals has lead to a method for embedding a large wave into a random sequence in such a way that the composite signal is virtually indistinguishable (in a rigorous statistical limit) from a purely random occurrence of a large wave. We demonstrate that this idea can be used to estimate the extreme response of a jack-up in a severe sea-state in a robust and efficient manner. Results are in good agreement with those obtained from a full random time-domain simulation.
Issue Section:Research Papers
Borgman, L. E., 1990, “Irregular Ocean Waves: Kinematics and Forces,” The Sea, Vol. 9, Part A, Le Me´haute´ B. and Hanes D. M., Wiley, eds., New York, pp. 121–168.
Improved Linear Representation of Ocean Surface Waves,”
J. Fluid Mech., Vol.
Improved Linear Representation of Surface Waves, Part 2, Slowly Varying Bottoms and Currents,”
J. Fluid Mech., Vol.
Harland, L. A., Vugts, J. H., Jonathan, P., and Taylor, P. H., 1996, “Extreme Response of Non-linear Dynamic Systems Using Constrained Simulations,” 15th OMAE Conference, Florence.
Jonathan, P., and Taylor, P. H., 1995, Proc. 14th OMAE Conference, Copenhagen, Vol. 1, pp. 9–16. “Irregular, Non-Linear Waves in a Spread Sea,”
Also submitted to ASME Journal of Offshore Mechanics and Arctic Engineering.
Jonathan, P., Taylor, P. H., and Tromans, P. S., 1994, “Storm Waves in the Northern North Sea,” 7th Int. Conf on Behaviour of Offshore Structures, MIT, Vol. 2, pp. 481–494.
Some Properties of a Normal Process Near a Local Maximum,”
Ann. Math. Statist, Vol.
Rodenbusch, G., 1986, “Random Directional Wave Forces on Template Offshore Platforms,” Proc. 18th Annual Offshore Technology Conference (OTC), Houston. OTC5098.
Tromans, P. S., Anaturk, A., and Hagemeijer, P., 1991, “A New Model for the Kinematics of Large Ocean Waves—Application as a Design Wave,” Proc. 1st Offshore and Polar Engineering (ISOPE) Conference, Edinburgh, Vol. 3, pp. 64–71.
Tromans, P. S., and van de Graaf, J. W., 1992, “A Substantiated Risk Assessment of an Offshore Jacket Structure,” Proc. 24th Annual Offshore Technology Conference (OTC), Houston. OTC7075.
This content is only available via PDF.
Copyright © 1997
by The American Society of Mechanical Engineers