Numerical simulation of nonlinear wave passing through permeable structures and evaluation of transmission coefficient formulae

The hydrodynamic characteristics of the wave permeable breakwater are described by new form of semi-empirical equation on transmission coefficient, based on numerical tests results and available experimental data. The phenomenon of partial transmission of wave around permeable breakwater is simulated by generating a spectrum wave, and the aim of the new form equation is to afford a convenient method for engineering design and practice. The equation was compared with the former experimental and theoretical work, e.g., the empirical expression by Van de Meer and by d'Angremond, it is concluded that in the range of the three expression applications, present formula shows a wider agreement with experimental data. Also it proves present expression is valuable to engineering practice.