Simulation of parametric ship roll and hull twist oscillations |
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Authors: | Aleš Tondl Radoslav Nabergoj |
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Affiliation: | (1) Zborovská 41, 15000 Praha, Czechosiovakia;(2) Institute of Naval Architecture, Via A. Valerio 10, 34127 Trieste, Italy |
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Abstract: | A new mechanical model for simulating both the ship oscillations and the induced twisting of the hull in the case of longitudinal seas is presented. Particular attention is given to the onset of parametric rolling, which may result from non-linearly coupled heave-pitch-roll motions. It is shown that in these sea conditions the phenomenon of twisting is likely to occur under a mechanism similar to that of parametric rolling. |
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Keywords: | Ship dynamics nonlinear oscillations parametric excitation effect of torsional elasticity |
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