MOTION AND LONGITUDINAL STRENGTH OF A SHIP IN HEAD SEA AND THE EFFECTS OF NON-LINEARITIES.

Abstract

In this paper, the authors investigate theoretically the motion and longitudinal strength of ships among waves taking account of the effects of nonlinearities such as the hull shape nonlinearity, bottom emergence, and hydrodynamic impact. The longitudinal bending moment in the main hull girder is calculated in case of bottom and/or bow-flare slamming, resulting whipping vibrations. Example calculations are performed for a flat-bottomed tanker-type ship with shallow fore draft and a fast container ship with large bow-flare.