EXPERIMENTAL STUDY OF HYDRODYAMIC LATERAL FORCE ABOUT A MODEL SHIP BERTHING AT A QUAY

It is important to know the lateral added masses of ships moving laterally toward a quay or moored near a quay because the presence of the quay will alter that portion of the potential flow component of the hydrodynamic lateral force that is caused by lateral acceleration. Furthermore, the other portion of this component, which is generated by lateral velocity, depends upon the rate of change in the added mass. The remaining component in the force equation is viscous drag, which varies with velocity. Although there have been theoretical studies of the hydrodynamic lateral force in restricted waters having a side wall, few experimental studies have been carried out. The authors therefore undertook model experiments for a 225 GT fish carrier boat. These were carried out using lateral accelerating tests, and changes in the lateral added mass as affected by the quay were analyzed.