Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Energy Harvesting by applying a Hysteretic Damped NES Device into a Portal Frame Platform of two-degrees-of-freedom
Submission Author:
Rodrigo Tumolin Rocha , SP
Co-Authors:
José Manoel Balthazar, Angelo Marcelo Tusset, Frederic Conrad Janzen, Rodrigo Tumolin Rocha
Presenter: Rodrigo Tumolin Rocha
doi://10.26678/ABCM.COBEM2017.COB17-0175
Abstract
This work presents energy harvesting application using a two-degrees-of-freedom portal frame platform with a nonlinear energy-sink device coupled to its supported beam, considering its horizontal motion. The nonlinear energy-sink (NES) device consists of a mass-spring-damper system, whose damping is viscoelastic, i.e., considered as a hysteretic damping. The portal frame has two-to-one internal resonance, which presents saturation phenomenon, partially transferring the vibration energy from one to other mode of vibration. The presence of the phenomenon allows the energy harvesting from the column vibration, which will receive the surplus vibration because of saturation. The energy harvesting is investigated in this case using a nonlinear piezoelectric material. The governing equations of motion of the system was derived by using the energy method of Lagrange considering the whole system coupled each other and nonlinear. The results showed with the hysteretic damping of the NES, the system became chaotic and the energy harvesting almost doubled.
Keywords
hysteretic damping, nonlinear energy-sink, saturation phenomenon, portal frame structure, energy harvesting
