Hydrodynamic investigation and characterization of floating offshore wind turbine platforms has gained substantial research attention. In this study, we perform a numerical investigation using an SPH-based tool to identify the frequency properties of a DeepCwind platform equipped with a system of inclined, taut mooring lines. An open dataset is used as a reference solution: a DeepCwind-like platform tested using the semi-submersible layout proposed during the OC5 experimental campaign. The platform was kept at station by a system of inclined, pre-tensioned lines. Here, the model is validated against a decay test and response amplitude operators. It has shown good performance, indicating its capability in capturing second-order effects.