Development of a Time Domain Boundary Element Method for the Seakeeping Behavior of a Cruise Ship

AuthorsG. D. Gkikas, F. van Walree
Conference/JournalOMAE ASME 33rd International Conference on Ocean, Offshore and Arctic Engineering, San Francisco, CA
DateJun 1, 2014
Development of a time domain boundary element method for the seakeeping behavior of a cruise ship under combined strong wind and extreme irregular beam seas
A computational method for the seakeeping behaviour of a cruise ship at zero speed and under severe wind and oblique wave loads is presented. The proposed methodology is a time-domain panel method where the transient Green functions used for the estimation and implementation of the free surface effects on the vessel's motions are estimated assuming constant low lateral speed, instead of the common practice zero speed influence functions. For the evaluation of the overall hydrodynamic forces, the so called 'blended approach' is followed in the sense that the induced hydrodynamic pressures due to the scattering and radiation phenomena are calculated over the linearized position of the body, ignoring any displacements with respect to its mean position, while the hydrostatic and non-linear Froude-Krylov forces are considered at the actual body location and taking into account the free surface elevation at each time step.
Tags
stability, seakeeping and ocean engineeringseakeepingpassengers and yachtingextreme conditionscruise and ferry