Nonlinear dynamics and bifurcation behavior of a 2-DOF spring resonator with end stopper for energy harvesting
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In this paper, the model of a two-degree-of-freedom (2-DOF) spring resonator with end stopper for an energy harvesting application is presented. Then we characterize its nonlinear dynamical behavior by numerical simulations when some suitable parameters are varied. The system is formed by two resonators subject to external vibrational excitation and with an end stopper. We present the continuous time dynamical model of the system in the form of a switched fourth order differential equation. Harmonic vibrations are considered as the main ambient energy source for the system and its frequency response representing the RMS value of the displacement is first computed. The dynamical behavior is unveiled by computing state-space trajectories, timedomain series and FFT spectra and frequency response as the excitation amplitude is varied.
CitacióEl Aroudi, A. [et al.]. Nonlinear dynamics and bifurcation behavior of a 2-DOF spring resonator with end stopper for energy harvesting. A: International Conference on Structural Dynamics and Diagnosis. "MATEC Web of Conferences: volume 16, 2014: CSNDD 2014: International Conference on Structural Nonlinear Dynamics and Diagnosis". Agadir: EDP Sciences, 2014, p. 08006-1-08006-6.