Research on motion reduction of wave-piercing catamaran with automatic control flap and T-foil

摘要

The appendages of fixed T-foil and stern flap had been proven effective for reducing longitudinal motion of WPC (wave-piercing catamaran) by a large number of experiments. However, with the increasing requirements for comfort and stabilization, research on automatically controlled flap and T-foil becomes very meaningful for further improving the seakeeping performance of WPC. In this paper, we introduced vibration wing theory into WPC seakeeping prediction with automatic control hydrofoil, and subsequently analyzed the optimal motion of the T-foil. The numerical prediction agrees well with the experimental results with acceptable error, which shows that the peak value of the pitch motion curve in regular wave of the hybrid-WPC is about 43% less than the bare-hull, and the significant amplitude of pitch decreases by 52% in irregular waves. Based on these results, we can conclude that vibration wing theory is an accurate and effective forecasting method.