불규칙파 조건에서 현수식 수중터널의 내력 연구

Investigation of Internal Forces on a Suspension Submerged Floating Tunnel under Irregular Waves

This study investigates the dynamic behavior of a suspension-type submerged floating tunnel (SFT) under irregular waves using OrcaFlex simulation. Key design parameters(main cable arch height, arrangement angle, submergence depth, and unit weight) were analyzed. The results demonstrate that an arch height of 80 m is optimal for stability, whereas an excessive height (150 m) significantly increases displacement and internal forces. Increasing the arrangement angle to 30° effectively mitigates sway motion, and deep submergence (100 m) drastically reduces wave-induced acceleration. While heavier cables suppress vibration, they induce higher static loads, indicating a trade-off relationship. Consequently, this study proposes an optimized configuration (80 m arch height, 30° angle, and deep submergence) to ensure structural safety and serviceability in deep-sea environments.