Mathematical study for analyzing caisson breakwater supported by two rows of piles

The hydrodynamic characteristics of the semi immersed caissons suspending by two rows of piles is experimentally and mathematically studied under normal regular waves. The effect of different wave and structural parameters is investigated e.g. the incident wave length and height, the caisson width and draft and the supporting piles diameter and spacing. The mathematical model based on an eigenfunction expansion method is developed to determine the hydrodynamic characteristics of such structures. In order to examine the validity of the mathematical model, the mathematical results are compared with different experimental and mathematical results. Comparison between experiments and predictions shows that the mathematical model provides a good estimate of the wave transmission, reflection, and energy dissipation coefficients when the lower pile part friction factor is fp=1.0. The proposed mathematical model gives a reasonable efficiency when compared with the mathematical and experimental results of other similar breakwater models.