Roll stabilisation of motorised vessels plays an important part in reducing passenger discomfort and increasing safety and cargo capacity. Passive free surface tanks are considered a low-cost stabilising method, which is efficient at all speeds without increasing hull resistance. In this study, a mathematical model for evaluating the performance of a passive free surface tank is established. This is done by coupling a roll model to a fluid flow model. As a numerical example, the seakeeping abilities of a container vessel are evaluated. The necessary methods for performing the simulation are presented and the design of a free surface tank is explained. The effects of the passive free surface tank are evaluated and a significant damping effect is observed, particularly in cases with resonant roll.
Proceedings of the Asme 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, 2014
Main Research Area:
33rd International Conference on Ocean, Offshore and Arctic EngineeringInternational Conference on Ocean, Offshore and Arctic Engineering, 2014