Wave interaction with a forced floating elastic beam in the presence of porous barriers

Abstract

The investigation focuses on the wave interaction with a floating finite elastic beam which is subjected to a transient force, in the presence of vertical barriers. The study considers three edge conditions: free edge, simply supported edge, and built-in edge conditions. The frequency-domain solution is obtained using the eigenfunction matching method, which involves dividing the solution into symmetric and antisymmetric parts. In addition, a time-domain analysis is conducted by applying Gaussian forcing at different positions on the beam, employing the Fourier transform for analysis. The vertical force on the beam and the time-dependent deflection of the beam are calculated for various porous parameter and water depths. Observations reveal that a forced beam with barriers of lower porosity exhibits increased deflection in free and simply supported edge beams. Additionally, numerical results have been assessed and verified against existing data. The findings from the combination of a forced floating elastic beam with vertical porous barriers will aid in shaping designs for safeguarding aquatic habitats, buoyancy control systems, wave energy conversion, and various other applications.