Publications

Guedes Soares, C. (1990), “Effect of Heavy Weather Maneuvering on the Wave Induced Vertical Bending Moments in Ship Structures”, Journal of Ship Research, Vol. 34, Issue 1, pp. 60-68

Statistical data are collected so as to quantify the probability of accurrence of voluntary course changes in heavy weather as well as their dependence on significant wave height and on ship heading. Decission rules are established about when and how to change course, on the basis of the analysis of operational data and of interviws with experienced shipmasters. A Monte Carlo simulation is performed so as to determine how as omnidirectional distribution of initial headings is changed by voluntary course changes depending on the significant wave height. Finally, the effect of the nonuniform distribution of headings on the mean wave-induced vertial bending moment is calculated. It is shown that although heavy weather maneuvering eases the ship motions, it can increase the wave-induced bending moments and thus increase the probability of structural failure.

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