Piezoelectric Energy Harvesting Of A Thin Panel Based On Aeroelastic Nonlinear Vibration

The flow-induced vibration are everywhere in the nature. For this reason, one of research hotspot is how to convert the flow-induced vibration into electricity. When high-speed train and aircraft flight, the panel of trains and aircraft will produce aeroelastic vibration, under the effect of aerodynamic force; Usually, the aeroelastic problem is harmful, should be avoided as far as possible, and the vibration of mechanical energy can be converted into electricity by piezoelectric patches, at the same time this will produce inhibition to the vibration of the panel; As a result, the stability of high-speed train and aircraft can be improved. Multiple piezoelectric energy harvester used in combination not only can supply power to microelectronics system, but also improve the stability of high-speed train and aircraft. Therefore, Theory, simulation and experimental research on energy harvesting of nonlinear aeroelastic vibration of panel after reading a lot of literature about panel flutter and piezoelectric energy harvester.Firstly, according to the theory of aeroelasticity, the theory of vibration, elastic mechanics, mechanics of materials and piezoelectric, Bernoulli-Euler beam theory etc, a linear mathematical model of cantilever plate structure with a piezoelectric and a nonlinear mathematical model of cantilever plate structure with a piezoelectric with nonlinear stiffness, and nonlinear inertia, nonlinear piezoelectric items are established to analyze the vibration and energy harvesting of cantilever plate.Secondly, according to the nonlinear mathematical model that had been developed, the aeroelastic dynamic response and the ability of energy harvesting of the cantilever plate structure with a piezoelectric are also analyzed at different speeds of wind, length and thickness of piezoelectric beam or the resistances connected to the piezoelectric beam. The aeroelastic dynamic response and the ability of energy harvesting of the curved panel structure with piezoelectric are also analyzed at different speed of wind and the resistances connected to the piezoelectric beam by using the finite element software( ANSYS) and computational fluid dynamics software(CFX). As a result, under a certain wind speed, damping effect is best, power output and material utilization maximum can be achieved by reasonable selection of the resistances and size of piezoelectric beam based on the analysis of different speed of wind, length and thickness of piezoelectric beam or the resistances connected to the piezoelectric beam.Finally, Once-through small at low speed wind tunnel was manufactured. labview DAQ program was made. These had been used for experiment research on flat panel and curved panel. The experimental results in good agreement with the theory and simulation through the experimental study on critical flutter velocity and energy harvesting of panel. As a result, the reliability of theory and simulation method was validated based on the experimental research.