Group of Marine Dynamics and Hydrodynamics > 2.2 Nonlinear Motions and Loads > Publications

Guedes Soares, C., Fonseca, N. and Pascoal, R. (2004), ), “Long Term Prediction of Nonlinear Vertical Bending Moments on a Fast Monohull”, Applied Ocean Research, Vol. 26, pp. 288-297

An assessment is made of the maximum wave induced bending moment expected to occur during the operational lifetime of a fast monohull, based on long term distribution calculations of the non-linear vertical bending moment at mid-ship. The ship is assumed to operate in the Northern North Sea, with an operational life of 25 years. A succession of short-term stationary ship responses represented by Rayleigh distributions of peaks results in the long-term distribution of the structural loads. Non-linear pseudo transfer functions are used in the procedure to calculate the variances of the short-term responses. The amplitudes of these transfer functions are calculated by a non-linear time domain seakeeping program. The results are compared with rules minimum required values and also with results from simpler calculation procedures such as adopting design sea states.

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