Nonlinear dynamics in a graphene nanostructured device for energy harvesting

摘要: Nonlinearities have been shown to play an important role in increasing the extracted energy of harvesting devices at macro and micro scales. Vibration-based on nano scale has also received attention. In this paper, we characterize nonlinear dynamical behavior a strained nanostructured graphene for its potential use applications. A compressed vibrating membrane sheet free from any external excitation is first studied. We present continuous time model system form double-well single degree freedom system. Equilibrium points are obtained their stability analysis carried out. Then, random vibrations considered as main ambient source performances terms well occupation zones, RMS value position, corresponding harvested presented steady state non-equilibrium regime when noise level control parameter. From model, out by computing space trajectories, probability density FFT spectra under deterministic excitation. The ultimate goal parameter exploration based upon behavioral provide design-oriented guidelines engineering graphene-based mechanical harvesters.