An efficient modeling methodology of piezoaeroviscoelastic systems for vibration-based energy harvesting and subsonic flutter suppression
摘要
In the open literature the flutter suppression and vibration-based energy harvesting using, respectively, viscoelastic materials and piezoelectric transducers have been studied by several authors. However, most of the available archives are limited to supersonic flight conditions and, furthermore, few papers have investigated the consequence of using the concept of piezoaeroviscoelasticity on the subsonic flutter suppression and electrical power generation, which motivates this contribution. Thus, the focus is placed on the mathematical modeling and numerical investigations of a two degrees of freedom typical wing section subjected to an unsteady airflow containing discrete viscoelastic mounts and attached to a resistive piezo-shunted circuit. In the modeling of the piezoaeroviscoelastic problem, the complex modulus approach combined with the concept of shift factor and reduced frequency has been retained to represent the frequency- and temperature-dependent behavior of the viscoelastic substructure. To model the unsteady aerodynamic loadings acting on the typical section, it was assumed the well-known linearized thin airfoil theory. Numerical simulations were performed for some design parameters and subsonic flight conditions to demonstrate the main features and capabilities of the proposed modeling methodology and the possibility of increasing the dynamic stability and power generation of the piezoaeroviscoelastic airfoil. In addition, a parametric study has been performed with the aim of evaluating the degree of influence of operating temperature and resistance on the stability and power generation.