Time-dependent water wave scattering by a marine structure consisting of an array of compound porous cylinders

Under the assumption of linear wave theory, a semi-analytical model is developed to address time-dependent water scattering problem involving marine structure consisting several circular rigid vertical cylinders, each which surrounded by thin cylindrical porous wall with region between inner cylinder and wall. The tackled applying eigenfunction expansion approach. energy dissipation relation also derived for system compound cylinders. principal focus this work lies in locating optimum geometrical configurations forces acting on are minimal along given direction frequency domain. Subsequently, response under impact Gaussian pulse examined. wavenumber at force its maximum obtained value porous-effect parameter. Moreover, that corresponding decreases as magnitude parameter increases. carefully validated numerically against results available existing literature.