Numerical investigation of the six degrees of freedom hydrodynamic performance of a sailboat in wave conditions

The hydrodynamic characteristics of sailboats in varying sea conditions are crucial for controlling the boats and complete the required movements. This paper investigates the six-element forces of Laser Radial sailboats under oblique sailing with firstorder waves. Numerical calculations employing the overlapping mesh technique and DFBI model provide insights into the sailboat's details. The study reveals significant findings: speed has a dominant influence on resistance, accounting for approximately 64% of the total. Wavelength factors contribute about 12%, while amplitude factors contribute about 24% at an 8-degree heel angle. As speed increases, resistance intensifies. Additionally, wavelength impacts the longitudinal pitching moment more obviously, while wave amplitude has a larger impact on the yawing moment.