... oscillatory flows. The results show that Cd and Cm differ from the values obtained under sinusoidal conditions by more than 30% to 40% in the inertia/drag regime of the Keulegan-Carpenter number (8<KC<25). Key Words: random hydrodynamic forces, oscillatory flow Nomenclature: Ao = cylinder cross-sectional area...

..., associated with changes in the added resistance as the vessel surges backwards and forwards through the wave field, encountering waves at a varying frequency. Boundary layer forces can become important at very low values of the effective Keulegan-Carpenter number if there is no current present. 108 Wave...

... correlated with the Keulegan- Carpenter number and gave plausible values, but with a fair amount of variability. The prediction of the force time series and hence of the local forces was reasonable, but the highest local force peak per period was consistently underpredicted, often severely. Inclusion of a so...