This dataset contains time-series simulation data generated by Pyro-E LLC using Simcenter STAR-CCM+ that characterizes the hydromechanical behavior of the Electrically Engaged unduLation (EEL) marine energy system. Data include measurements of tail displacements in the X and Z directions and estimates of horizontal and vertical thrust forces produced by the EEL device. Simulations were conducted for incident wave periods of 1, 3, and 9 seconds, across wave heights from 0.1 m to 1.6 m. All data are stored in CSV format, with units indicated in column headers. Data files are organized and named via wave period and height in the archive below. Physical testing by Pyro-E informed these simulations, which were performed in collaboration with Oak Ridge National Laboratory to assess the material response of the EEL system under varying hydrodynamic conditions. The data complement the accompanying public report titled "Electrically Engaged UnduLation (EEL) Marine Energy System." This data collection was funded by TEAMER RFTS 2 (request for technical support) program.