Abstract:
Vertical perforated revetments have broad application prospects in the ecological transformation of inland waterways. However, ship-generated waves in inland waterways possess unique characteristics such as strong suddenness, large wave steepness and concentrated energy, making existing wave dissipation research based on conventional sea waves difficult to apply directly. To investigate the wave dissipation mechanism of ecological revetments with different perforation types under the action of ship-generated waves, a three-dimensional numerical wave tank is constructed in this study. After verifying the reliability of the numerical model through grid convergence, theoretical solutions, and physical model tests, the dynamic response and wave dissipation performance of the flat-grid and straight-hole revetments under different perforation sizes, incident wave heights, and water depths are systematically compared. The research results show that in terms of structural selection, the straight-hole revetment generally outperforms the flat-grating type in reducing the transmitted wave height and flow velocity behind the structure. Regarding the size effect, the wave dissipation performance is closely related to the perforation size, and reducing the hole diameter or grating clearance can significantly enhance the wave dissipation effect. For wave response, an increase in incident wave height enhances the reflection effect of the revetment, and the straight-hole revetment exhibits superior wave dissipation advantages under large wave height conditions. Regarding water depth, its variation significantly alters the interaction mechanism between waves and perforated structures, with the wave height behind the straight-hole revetment reaching its minimum under low water level conditions. This study can provide theoretical references for the structural selection and optimization design of ecological revetments in inland waterways.