ABSTRACT A kinematics model of the ship wake in presence surface waves, generated by wind is presented. It was found that stationary wave structure behind covered a wedge region with 16.9° half an angle at top and only divergent waves are present for co propagating waves. Wind field directed some nonzero to motion can cause essential asymmetry compressing its windward half. The extension Whitham-Lighthill theory intermediate sea depth also essentially depends from Froude ( Fr ) number based...

This paper presents a frequency domain method for predicting the relative wave elevation due to hydrodynamic interaction between two floating structures in beam waves. The strip has been found be practically useful technique analyze hydrodynamically coupled motions of parallel two-dimensional procedure which is an integral equation therefore used this paper. present study uses linearized resultant pressure including effect calculate elevation. Both diffraction and radiation cases are...

Based on the linear superposition technique, a hydrodynamic mathematical model of SWATH ship motion simulation with controllable fin in longitudinal irregular waves is developed. The self-tuning fuzzy control algorithm including back-propagation-based controller and gradient descent method applied to reduce pitch stabilizing fins. surge force viscous also included present model. After comparing results using static controller, we find that appears be more efficient for operating fins while...

The paper presents a strip theory and its correlation with experiment analysis on the relative motions of two ships. ships are in close proximity parallel position oblique waves. two-dimensional procedure takes account hydrodynamic interaction between cylindrical bodies. It was found that method is useful technique to predict hydrodynamically coupled

Abstract An analytical procedure for evaluating the lateral drifting forces and moments between two ships in oblique waves by near-field method is presented this paper. The velocity potential, including hydrodynamic interactions are evaluated a two-dimensional sink-source technique. Then strip theory applied to calculate sectional force of whole can be obtained Simpson rules. Four components mean which relative wave term dominant, whereas Bernoulli quadratic component secondary. negative...