Due to increasing in the migration of the population to coastal areas and the use of world energy demands, there is a need to develop and analyze a multi-use floating structure model which could find applications to floating breakwaters and wave energy conversions in order to meet coastal protection and the worldwide demand energy. The HYDROELASTWEB project seeks to develop the mathematical model and solution techniques for three-dimensional (3D) analytical hydrodynamic model for linear hydroelastic behavior of flexible floating structures for applications to floating breakwater and wave energy conversions.