engleski

Solution of Non-linear Ship Motions in Regular Head Waves

The non-linear effects of large motion, caused by added mass, damping coefficients, exciting force and restoring force change with time, cannot be neglected. When an incoming wave approaches the body, an instantaneous draft is computed, and the draft respective coefficients are interpolated using linear regression method. The equations of non-linear motion of ship in head waves are formulated. The wave is described by linear theory. To solve the coupled time-dependent equations of motion, the trigonometric series method is developed. The comparison of results with experimental values confirms the numerical results. Furthermore, the results of non-linear absolute bow motions are presented.

non- linear ship motions; hydrodynamic coefficients; trigonometric series method

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