Study of hull angle influence on SWATH heave and pitch motions

摘要

The interest in Small Waterplane Twin Hull(SWATH)vessels has Lead to the refinement in SWATH Design. This paper examines the Heave and pitch motion of a SWATH model with different side Hull angles in head, quarter, and Beam seas. The results show that Maximum heave and pitch motions Occur when the hulls are canted (angled)to 45°in heat seas. Qualitative agreement was obtained With seakeeping calculations per- Formed using Hooft's method. while The overall agreement is good, the Comparison of the experiments and Calculation results show the impor- Tance of viscous damping in the pre- Diction of the maximum heave and Pitch motion values.