An experimental study on the hydrodynamic performance of pile-supported caisson-type breakwaters with inclined porous plates under regular waves

Laboratory experiments are carried out to investigate the hydrodynamic performance of a new pile-supported caisson breakwater with inclined porous plates. Reflection and transmission coefficients are analyzed for various wave and structural parameters, including incident wave height, wave period, plate porosity, number of layers, and plate arrangement. The results show that reducing the porosity of the porous plate can significantly lower the transmission coefficient. Additionally, increasing the number of plate layers enhances wave attenuation and reduces wave reflection. Furthermore, arranging the front layer with higher porosity and the back layer with lower porosity substantially improves the wave attenuation performance of the breakwater. In practical applications, optimal protection across a wide range of wave periods can be achieved by adjusting the porosity and arrangement of the porous plate. The findings of this study provide a valuable reference for the optimal design of pile-supported caisson-type breakwater with perforated porous plates in coastal protection engineering.