A numerical method for predicting the hydroelastic response of marine propellers

[Display omitted] •The performance of elastic marine propellers was examined in both one-way and two-way fluid-structure interaction.•Added-mass and -damping matrices due to fluid-structure interaction were derived by applying the non-penetration condition.•A modal reduction technique was applied to overcome the low numerical efficiency caused by the asymmetric added matrices.•Three-dimensional panel methods in time and frequency domain combined with the finite element method were employed.•The two-way fluid-structure interaction must be employed to predict the unsteady performance of elastic propellers. This paper focuses on the development of a numerical model for predicting the hydroelastic responses of marine propellers oscillating in the wake of a submarine. The added-mass and -damping matrices due to strongly coupled fluid-structure interaction were considered. Three-dimensional panel methods in time and frequency domains combined with the finite element method were employed to study the hydrodynamic performance of the propeller. The panel methods were used to evaluate the hydrodynamic forces generated by the wake, and the finite element method was applied to determine the hydroelastic response of the propeller due to the pressure fluctuation. For predicting the structural responses, a mode superposition method combined with Wilson-θ method was employed to overcome the low numerical efficiency caused by the asymmetric added mass and damping matrices. The proposed numerical model was validated by comparing with other numerical solutions. The performance of the propellers was examined by considering one-way and two-way fluid-structure interactions.