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.