Supersonic aerodynamic piezoelectric energy harvesting performance of functionally graded beams

In this study, a novel multifunctional nonlinear composite structure consisting of functionally graded beams and piezoelectric sheets is proposed. This structure exhibits excellent supersonic aerodynamic energy harvesting performance under heating conditions. Referring to the geometric large deformation theory, the electromechanical coupling dynamics equation of the whole structure under supersonic aerodynamic force and the thermal environment is established by Hamilton's principle. The energy harvesting effect of piezoelectric sheets is simulated by Runge-Kutta algorithm. The correlation parameters of the length-to-fine ratio, gradient index, resistance, airflow speed, and temperature were compared and analyzed. Results show that this new multifunctional nonlinear composite structure can achieve the ideal energy harvesting effect and proper adjustment of parameters can improve the energy harvesting effect under the thermal environment. This study provides new ideas for related research on nonlinear energy harvesting under heating conditions.