쌍추진 여객선의 횡경사와 여객 보행 안전에 관한 연구 = Heel Angle and Passenger Walking Safety on Twin-Screw Passenger Ships

다국어 초록 (Multilingual Abstract)

In recent years, the adoption of twin-screw passenger ships has increased. These vessels demonstrate excellent turning performance through independent control of dual propellers and rudders. However, compared with conventional single-screw ships, they are more likely to induce excessive heel angles during maneuvering, which can directly affect passenger walking stability. This study analyzes the effect of heel angles generated during turning maneuvers on the walking stability of passengers aboard twin-screw vessels. Maximum heel angles under various loading conditions and service speeds were measured via model tests and actual sea trials. Anthropometric data of Korean adult males and females were applied along with the motion-induced interruptions(MII) theory to estimate the tipping angle during walking. The analysis revealed that under low GM, turning with large rudder angles at high speed can result in heel angles that exceed the human tipping threshold. Furthermore, empirical walking experiments conducted in a ship inclination training facility showed that passenger walking became unstable at inclinations above 20° and virtually impossible at 30°. Based on these findings, this study proposes safety guidelines, including rudder-angle limitations, GM thresholds for twin-screw vessels, and restrictions on passenger movement during significant heel events.