Nonlinear dynamics of asymmetric bistable energy harvesters

João Pedro Norenberg (1) , Roberto Luo (2) , Vinicius Lopes (2) , João Peterson (2) , Americo Cunha Jr (2)

1 UNESP - Universidade Estadual Paulista Júlio de Mesquita Filho = São Paulo State University
2 UERJ - Universidade do Estado do Rio de Janeiro [Brasil] = Rio de Janeiro State University [Brazil] = Université d'État de Rio de Janeiro [Brésil]

The paper investigates asymmetries effects over a nonlinear vibration energy harvester dynamics. The asymmetric system performance is compared with symmetric ones. Different asymmetry levels on restoring force and gravity action are investigated from a system-sloping angle variation. Bifurcation diagrams and basins of attraction are used to examine the local and global characteristics underlying dynamical systems under different excitation energy. The results show the adverse effects of asymmetries on system dynamics. They also reveal ways to overcome them by canceling asymmetric influence from optimal sloping angle values and improving asymmetric system performance over symmetrical ones. This comprehensive numerical study provides novel valuable insights into asymmetrical energy harvester dynamics, a wide and still less explored topic.

Mots clés: energy harvesting; nonlinear dynamics; asymmetric oscillator; bifurcation diagrams; basins of attraction

Domaines: Vibrations [physics.class-ph]; Statistiques [math.ST]; Dynamique Chaotique [nlin.CD]; Génie mécanique [physics.class-ph]; Mécanique des solides [physics.class-ph]

João Pedro Norenberg, Roberto Luo, Vinicius Lopes, João Peterson, Americo Cunha Jr. Nonlinear dynamics of asymmetric bistable energy harvesters. International Journal of Mechanical Sciences, 2023, 257, pp.108542. ⟨10.1016/j.ijmecsci.2023.108542⟩. ⟨hal-02013382⟩