Abstarct: In this study, nonlinear modeling and vibration analysis of an airfoil have been studied to investigate the potential of piezoelectric energy absorbers under simultaneous ground and current excitations. At first, an airfoil under the concurrent baxse and flow excitations were investigated as a two-degree nonlinear system with linear and torsional stiffnesses and related equations have been driven. Then nonlinear stiffnesses in the vertical direction (immersion) (kl & knl), and torsional linear and nonlinear torsional stiffnesses (kal & kanl)are simultaneously added to the relevant model. A piezoelectric energy absorber is then connected to a two-degree nonlinear freedom system. Perturbation and numerical methods have been used to study the vibrational and nonlinear resonance responses of the system. Using simulation results, we have extracted the system responses and examined the effect of various physical parameters on them.