AI 中文总结
该研究针对双峰海况开展流固耦合模拟，验证了波浪辅助推进系统的峰值频率标度框架的稳健性，提出需自适应水弹性调谐以最大化推力，为相关推进系统设计提供指导。
AI 中文摘要
波浪辅助推进（WAP）系统利用海浪能量产生推进推力，为提高海洋航行器的续航能力和能源效率提供了一种有前景的方法。以往研究主要集中在单色或单峰海浪条件下，而现实海洋环境中的WAP性能在很大程度上尚未被探索。本研究调查了浸没式拍动水翼在由涌浪与风浪系统共存产生的双峰海况下的水动力和水弹性响应。针对代表性的平静、过渡和风暴海况，进行了高保真流固耦合模拟，其中通过扭转弹簧提供被动俯仰运动。模拟结果显示，尽管双峰波浪激励的复杂性增加，推进性能仍遵循先前针对单色和单峰波浪确立的相同有效峰值频率标度，证明该标度框架在广泛海况下的稳健性。研究结果进一步表明，虽然最优归一化调谐比保持在狭窄范围内，但有量纲扭转弹簧刚度随海况特征变化，凸显了自适应水弹性调谐以最大化推力的必要性。总体而言，结果表明WAP系统在现实海洋条件下提供了一种稳健的波浪动力推力产生手段，同时为改进波浪动力海洋推进系统的设计提供了实用指导。
英文摘要
Wave-assisted propulsion (WAP) systems harvest ocean wave energy to generate propulsive thrust, offering a promising approach for improving endurance and energy efficiency of marine vehicles. Previous studies have focused primarily on monochromatic or unimodal wave conditions, leaving WAP performance in realistic ocean environments largely unexplored. This study investigates the hydrodynamic and hydroelastic response of a submerged flapping hydrofoil operating in bimodal sea states generated by the coexistence of swell and wind-sea wave systems. High-fidelity fluid--structure interaction simulations are performed for representative calm, transitional, and storm conditions, with passive pitching provided through a torsional spring. Simulations show that, despite increased complexity of bimodal wave forcing, propulsion performance follows the same effective peak frequency scaling previously established for monochromatic and unimodal waves, demonstrating the robustness of this scaling framework across a broad range of sea states. The findings further reveal that while the optimal normalized tuning ratio remains within a narrow range, dimensional torsional spring stiffness varies with sea state characteristics, highlighting the need for adaptive hydroelastic tuning to maximize thrust. Overall, the results demonstrate that WAP systems provide a robust means of generating wave-powered thrust under realistic ocean conditions while providing practical guidance for improved design of wave-powered marine propulsion systems.
